Heterocyclic Building Block-benzofuran

Bridelia ferruginea dye-synthesized zinc oxide nanoparticles and its nitrogen and sulphur doped as a photoanode in photovoltaic cell fabrication was written by Gurgur, E.;Oluyamo, S. S.;Adetuyi, A. O.;Omotunde, O. I.;Okoronkwo, A. E.;Famogun, M. G.. And the article was included in Bulletin of Materials Science in 2022.Reference of 496-16-2 This article mentions the following:

The current global challenges re-emphasized the need to deviate from the use of fossil fuels. Photovoltaics cells with proper and adequate manufacturing processes have consistently shown excellent characteristics capable replacements for the fossil fuels. ZnO nanoparticle was synthesized using Bridelia ferruginea dye and subsequently doped with nitrogen (N) and sulfur (S), via thermal annealing. The phytochem. anal. of dyes shows a high presence of the phenolic group, while the quant. (antioxidant parameters) anal. to identify capping and stabilizing agents confirmed the presence of phenol (9.83 mg g^-1), flavonoid (171.01 mg g^-1), FRAP (0.412 mM g^-1), DPPH (12.63) and Fe chelation ability (7.12%). Trans-Octadec-9-enoic acid, n-hexadecanoic acid and Phytol which are the major compounds in the dye were identified with the aid of GC/MS spectroscopy. The synthesized ZnO and ZnO-N,S were characterized using UV-vis spectroscopy and shows characteristic absorption between 300 and 400 nm. Fourier transform IR identifies some of the functional groups (N-O, C=O and OH) that actively reduced the bulk material to their nanoform. X-ray diffraction confirmed crystallinity for ZnO nanoparticles and a mixture of amorphous and crystallinity when the nanoparticles were doped with N and S with corresponding grain sizes of 19.02 and 18.98 nm, resp. BET plot reveals surface areas of 30 and 15 m² g^-1 for ZnO and ZnO-N,S, resp. SEM-energy-dispersive X-ray spectroscopy and transmission electron microscopy confirmed the morphol. and the elemental composition of the synthesized nanomaterials. Photoelectrochem. anal. affirmed the alternation of synthesized material from an n-type to a p-type conductivity as the temperature varies. The photovoltaic properties of the fabricated dye-sensitized solar cells (DSSCs) were evaluated using electrochem. impedance spectra, this has proven DSSCs assembled with the ZnO-N,S photoanode to have a better solar to elec. energy conversion (0.67%) when compared with DSSCs with ZnO photoanodes. The relatively high conversion efficiency of ZnO-N,S reveals its suitability for use in high-performance DSSCs. Moreover scaling up the material for public utilization could assist considerably to solve the perennial power crises in developing countries as well as curtain the use of fossil fuel, which is identified as a major source of pollutants to the environment. In the experiment, the researchers used many compounds, for example, 2,3-Dihydrobenzo[b]furan (cas: 496-16-2Reference of 496-16-2).

2,3-Dihydrobenzo[b]furan (cas: 496-16-2) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Substituted benzofurans find applications such as fluorescent sensors, oxidants, in drug discovery, and in another field of chemistry and agriculture.Reference of 496-16-2

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Synthesis of 5-hydroxy-N-(2-vinyloxyalkyl)indoles from dicarbonyl compounds and vinyloxyalkylamines was written by Kukharev, B. F.;Stankevich, V. K.;Klimenko, G. R.;Lobanova, N. A.. And the article was included in Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya) in 1997.Formula: C11H10O3 This article mentions the following:

N-(Vinyloxyalkyl) enamino ketones were obtained by the condensation of vinyloxyalkylamines with acetylacetone or Et acetoacetate. Their subsequent reactions with 1,4-benzoquinone produce the corresponding 5-hydroxy-2-methyl-N-(2-vinyloxyalkyl)indoles in 17-43% yields. The structures of the compounds obtained were confirmed by IR and ¹H NMR spectroscopy. In the experiment, the researchers used many compounds, for example, 1-(5-Hydroxy-2-methylbenzofuran-3-yl)ethanone (cas: 28241-99-8Formula: C11H10O3).

1-(5-Hydroxy-2-methylbenzofuran-3-yl)ethanone (cas: 28241-99-8) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. As benzofurans are prone to undergo ring opening of the heterocycle, examples of reduction of this type of aromatics by using dissolving metals are rather scarce.Formula: C11H10O3

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Semisynthesis and Insecticidal Activity of Some Fraxinellone Derivatives Modified in the B Ring was written by Guo, Yong;Qu, Huan;Zhi, Xiaoyan;Yu, Xiang;Yang, Chun;Xu, Hui. And the article was included in Journal of Agricultural and Food Chemistry in 2013.Category: benzofurans This article mentions the following:

A series of novel fraxinellone derivatives modified at the C-1 or C-8 position in the B ring were prepared as insecticidal agents against the pre-third-instar larvae of oriental armyworm, Mythimna separata Walker at 1 mg/mL. Five key steric configurations of five compounds were further determined by single-crystal X-ray diffraction. It was found that the kinds and the amount of the reduction products of fraxinellone were related to the molar ratio between the reduction agent Red-Al and the substrate fraxinellone. Among all of the derivatives, compounds (I) and (II), (III) and (IV) displayed more promising insecticidal activity than their precursors fraxinellone and toosendanin. The preliminary structure-activity relationships revealed that the lactone (B-ring) of fraxinellone contributed to the observed insecticidal activity; the double bond at the C-2 position of fraxinellone was not necessary for the insecticidal activity; conversion of the oxygen atom of carbonyl group on the lactone of fraxinellone to a sulfur one does not improve the insecticidal activity; introduction of electron-withdrawing groups on the Ph ring of (V), to the benzoyloxy series, could result in more potent compounds In the experiment, the researchers used many compounds, for example, (3R,3aR)-3-(Furan-3-yl)-3a,7-dimethyl-3a,4,5,6-tetrahydroisobenzofuran-1(3H)-one (cas: 28808-62-0Category: benzofurans).

(3R,3aR)-3-(Furan-3-yl)-3a,7-dimethyl-3a,4,5,6-tetrahydroisobenzofuran-1(3H)-one (cas: 28808-62-0) belongs to benzofurans derivatives. Benzofuran is the “”parent”” of many related compounds with more complex structures. For example, psoralen is a benzofuran derivative that occurs in several plants. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.Category: benzofurans

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Chemical constituents from the whole plants of Trifolium pratense L was written by Peng, Jing-bo;Yang, Wen-ju;Li, Zhan-lin;Gao, Yin-yin;Hua, Hui-ming. And the article was included in Shenyang Yaoke Daxue Xuebao in 2008.Electric Literature of C22H22O10 This article mentions the following:

The objective of this paper is to study the chem. constituents of dried whole plants of Trifolium pratense L. Compounds were isolated and purified repeatedly by silica gel, Sephadex LH-20 and ODS column chromatog. and preparative TLC, and their chem. structures were elucidated by their physicochem. properties and spectral anal. The results showed that sixteen compounds were obtained and identified as maackiain (1), quercetin (2), pinitol (3), salicylic acid (4), calycosin-7-O-β-D-glucoside (1), formononetin (6), trifolirhizin (7), sissotrin (8), daidzin (9), genistin (10), irilone (11), biochanin A (12), genistein (13), pratensein (14), daidzein (15), and ononin (16). It has been concluded that compounds 3 and 4 are isolated from this plant for the first time. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (cas: 6807-83-6Electric Literature of C22H22O10).

(2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (cas: 6807-83-6) belongs to benzofurans derivatives. Benzofuran is the “”parent”” of many related compounds with more complex structures. For example, psoralen is a benzofuran derivative that occurs in several plants. As benzofurans are prone to undergo ring opening of the heterocycle, examples of reduction of this type of aromatics by using dissolving metals are rather scarce.Electric Literature of C22H22O10

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Characterization of the distributions of collagen and PGs content in the decellularized book-shaped enthesis scaffolds by SR-FTIR was written by Shi, Qiang;Chen, Can;Li, Muzhi;Chen, Yang;Xu, Yan;Hu, Jianzhong;Liu, Jun;Lu, Hongbin. And the article was included in BMC Musculoskeletal Disorders in 2021.Application of 1461-15-0 This article mentions the following:

Bone-tendon interface (enthesis) plays a pivotal role in relaxing load transfer between otherwise structurally and functionally distinct tissue types. Currently, decellularized extracellular matrix (DEM) from enthesis provide a natural three-dimensional scaffold with tissue-specific orientations of extracellular matrix mols. for enthesis regeneration, however, the distributions of collagen and PGs content in the decellularized book-shaped enthesis scaffolds from rabbit rotator cuff by SR-FTIR have not been reported. Native enthesis tissues (NET) harvested from rabbit rotator cuff were sectioned into cuboid (about 30 mm × 1.2 mm × 10 mm) for decalcification. The decellularized book-shaped enthesis scaffolds and intrinsic ultrastructure were evaluated by histol. staining and SEM (SEM), resp. The distributions of collagen and PGs content in the decellularized book-shaped enthesis scaffolds from rabbit rotator cuff were also measured innovatively by SR-FTIR. The decellularized book-shaped enthesis scaffolds from rabbit rotator cuff were successfully obtained. Histomorphol. and SEM evaluated the effect of decellularization and the structure of extracellular matrix during decellularization. After mech. testing, the failure load in the NET group showed significantly higher than that in the DEM group (P < 0.05). Meanwhile, the stiffness of the DEM group was significantly lower than the NET group. Furthermore, the distributions of collagen and PGs content in the decellularized book-shaped enthesis scaffolds were decreased obviously after decellularization by SR-FTIR quant. anal. SR-FTIR was applied innovatively to characterize the histol. morphol. of native enthesis tissues from rabbit rotator cuff. Moreover, this technol. can be applied for quant. mapping of the distribution of collagen and PGs content in the decellularized book-shaped enthesis scaffolds. In the experiment, the researchers used many compounds, for example, 2,2′,2”,2”’-(((3′,6′-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-2′,7′-diyl)bis(methylene))bis(azanetriyl))tetraacetic acid (cas: 1461-15-0Application of 1461-15-0).

2,2′,2”,2”’-(((3′,6′-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-2′,7′-diyl)bis(methylene))bis(azanetriyl))tetraacetic acid (cas: 1461-15-0) belongs to benzofurans derivatives. Benzofuran derivatives are one of the most important oxygen-containing heterocycles. Benzofurans are stable towards alkali and readily polymerize on treatment with sulfuric acid, due to which they are useful for the preparation of low cost chemically relatively inert resins.Application of 1461-15-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

In Vitro Study Evaluating the Effect of Different Immunosuppressive Agents on Human Polyomavirus BK Replication was written by Favi, Evaldo;Signorini, Lucia;Villani, Sonia;Dolci, Maria;Ticozzi, Rosalia;Basile, Giuseppe;Ferrante, Pasquale;Ferraresso, Mariano;Delbue, Serena. And the article was included in Transplantation Proceedings in 2022.Category: benzofurans This article mentions the following:

Human polyomavirus BK (BKPyV) is the etiol. agent of polyomavirus-associated nephropathy, a leading cause of kidney transplant dysfunction. Because of the lack of antiviral therapies, immunosuppression minimization is the recommended treatment. This strategy offers suboptimal outcomes and entails a significant risk of rejection. Our aim was to evaluate the effect of different immunosuppressive drugs (leflunomide, tacrolimus, mycophenolic acid, sirolimus, and everolimus) and their combinations in an in vitro model of BKPyV infection. Human renal tubular epithelial cells were infected with BKPyV and treated with leflunomide, tacrolimus, mycophenolic acid, sirolimus, and everolimus, administered alone or in some combination thereof. Viral replication was assessed every 24 h (up to 72 h) by BKPyV-specific quant. real-time polymerized chain reaction for the VIRAL PROTEIN 1 sequence in cell supernatants and by western blot anal. targeting the viral protein 1 and the glyceraldehyde 3-phosphate dehydrogenase on total protein lysates. Results were described as viral copies/mL and compared between treatments at any prespecified time point of the study. The highest inhibitory effects were observed using leflunomide or everolimus plus mycophenolic acid (mean BKPyV replication log reduction 0.28). The antiviral effect of everolimus persisted when it was used in combination with tacrolimus (mean BKPyV replication log reduction 0.27). Our experience confirms that everolimus has anti-BKPyV properties and prompts future research to investigate possible mechanisms of action. It also provides a rational basis for targeted clin. trials evaluating alternative immunosuppressive modification strategies. In the experiment, the researchers used many compounds, for example, (E)-6-(4-Hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydroisobenzofuran-5-yl)-4-methylhex-4-enoic acid (cas: 24280-93-1Category: benzofurans).

(E)-6-(4-Hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydroisobenzofuran-5-yl)-4-methylhex-4-enoic acid (cas: 24280-93-1) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. Benzofurans have also made significant and distinctive contributions to biology. They exhibit several biological activities that range from antioxidant, antitubercular, antiplasmodial, insecticidal.Category: benzofurans

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Solid phase adsorption of crystal violet lactone on silica nanoparticles to probe mechanochemical surface modification was written by Ichimura, Kunihiro;Funabiki, Akira;Aoki, Ken-ichi;Akiyama, Haruhisa. And the article was included in Langmuir in 2008.Recommanded Product: Crystal violet lactone This article mentions the following:

The solid phase adsorption of crystal violet lactone (CVL) on 5 types of Stober SiO₂ nanopowders with BET sp. surface areas in the range of 50-800 m²/g under dry milling conditions was described for the first time. The H bonding between surface silanol and the carboxylate of the ring-opened triphenylmethane dye (CVL⁺) led to the formation of monolayers of CVL⁺ in a flat-laid configuration. The λ_max of CVL⁺ in diffusive reflection visible spectra was influenced by the particle size of SiO₂ powders, suggesting that the microenvironmental polarity of adsorbed CVL⁺ is considerably reduced along with the decrease of the particle size. The solid phase adsorption of CVL obeyed Langmuir adsorption isotherms to give a saturated amount of CVL⁺ for every SiO₂ nanoparticle. The surface concentration of CVL⁺ on nanoparticles at the saturation was estimated to be 0.31 mg/m² on average, disclosing that about 52% of the surface can be covered by CVL⁺ under the assumption that the BET-sp. surface areas are equivalent to the real surfaces active for the CVL adsorption. The generation of the blue color of CVL provided a convenient means to estimate qual. and quant. anal. of the surface coverage with surface-active reagents, which conceal surface silanols. Subsequently, SiO₂ nanoparticles were milled with a surface modifier, followed by milling with CVL to observe the intensity of the blue color to disclose that the surface coverage with oligo- and polyethylene glycols as well as with nonionic surfactants by dry milling was specifically determined by the number of repeating oxyethylene units. Although the surface-active reagents were easily desorbed in water, the desorption was notably suppressed by milling with CVL, suggesting that the surface-modified particles with the surface-active reagents are covered with ultrathin films of CVL. In the experiment, the researchers used many compounds, for example, Crystal violet lactone (cas: 1552-42-7Recommanded Product: Crystal violet lactone).

Crystal violet lactone (cas: 1552-42-7) belongs to benzofurans derivatives. Benzofuran derivatives are one of the most important oxygen-containing heterocycles. As benzofurans are prone to undergo ring opening of the heterocycle, examples of reduction of this type of aromatics by using dissolving metals are rather scarce.Recommanded Product: Crystal violet lactone

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

The Effect of Prucalopride on Small Bowel Transit Time in Hospitalized Patients Undergoing Capsule Endoscopy. was written by Alsahafi, Majid;Cramer, Paula;Chatur, Nazira;Donnellan, Fergal. And the article was included in Canadian journal of gastroenterology & hepatology in 2017.Formula: C18H26ClN3O3 This article mentions the following:

Background: The inpatient status is a well-known risk factor for incomplete video capsule endoscopy (VCE) examinations due to prolonged transit time. We aimed to evaluate the effect of prucalopride on small bowel transit time for hospitalized patients undergoing VCE. Methods: We included all hospitalized patients who underwent VCE at a tertiary academic center from October 2011 through September 2016. A single 2 mg dose of prucalopride was given exclusively for all patients who underwent VCE between March 2014 and December 2015. VCE studies were excluded if the capsule was retained or endoscopically placed, if other prokinetic agents were given, in cases with technical failure, or if patients had prior gastric or small bowel resection. Results: 442 VCE were identified, of which 68 were performed in hospitalized patients. 54 inpatients were included, of which 29 consecutive patients received prucalopride. The prucalopride group had a significantly shorter small bowel transit time compared to the control group (92 versus 275.5, p < 0.001). There was a trend for a higher completion rate in the prucalopride group (93.1% versus 76%, p = 0.12). Conclusions: Our results suggest that the administration of prucalopride prior to VCE is a simple and effective intervention to decrease small bowel transit time. In the experiment, the researchers used many compounds, for example, 4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide (cas: 179474-81-8Formula: C18H26ClN3O3).

4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide (cas: 179474-81-8) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Benzofurans have also made significant and distinctive contributions to biology. They exhibit several biological activities that range from antiviral, antimicrobial, antitumor, anti-inflammatory.Formula: C18H26ClN3O3

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Reducing Hypothalamic Stem Cell Senescence Protects against Aging-Associated Physiological Decline was written by Xiao, Yu-Zhong;Yang, Mi;Xiao, Ye;Guo, Qi;Huang, Yan;Li, Chang-Jun;Cai, Dongsheng;Luo, Xiang-Hang. And the article was included in Cell Metabolism in 2020.Quality Control of (2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol This article mentions the following:

Age-dependent loss of hypothalamic neural stem cells (htNSCs) is important for the pathol. consequences of aging; however, it is unclear what drives the senescence of htNSCs. Here, we report that a long non-coding RNA, Hnscr, is abundantly expressed in the htNSCs of young mice but decreases markedly in middle-aged mice. We show that depletion of Hnscr is sufficient to drive the senescence of htNSCs and aging-like phenotypes in mice. Mechanistically, Hnscr binds to Y-box protein 1 (YB-1) to prevent its degradation and thus the attenuation of transcription of the senescence marker gene p16^INK4A. Through mol. docking, we discovered that a naturally occurring small compound, theaflavin 3-gallate, can mimic the activity of Hnscr. Treatment of middle-aged mice with theaflavin 3-gallate reduced the senescence of htNSCs while improving aging-associated pathol. These results point to a mediator of the aging process and one that can be pharmacol. targeted to improve aging-related outcomes. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (cas: 6807-83-6Quality Control of (2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol).

(2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (cas: 6807-83-6) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Introduction of benzofurans in organic synthesis, particularly drug synthesis, involves generally the use of their metalated species as nucleophiles in addition reactions or in metal-catalysed cross-coupling reactions.Quality Control of (2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Synthesis of rifaximin loaded chitosan-alginate core-shell nanoparticles (Rif@CS/Alg-NPs) for antibacterial applications was written by Kumar, Deepak;Kumar, Sumit;Kumar, Shailesh;Rohatgi, Soma;Kundu, Patit P.. And the article was included in International Journal of Biological Macromolecules in 2021.SDS of cas: 80621-81-4 This article mentions the following:

The present work aims to synthesize the rifaximin loaded chitosan-alginate core-shell nanoparticles (Rif@CS/Alg-NPs) for antibacterial applications. The core-shell nanoparticles (Rif@CS/Alg-NPs) were characterized by Fourier Transform IR (FT-IR) spectroscopy, SEM (SEM), Transmission Electron Microscopy (TEM), X-rays diffraction (XRD) and zeta analyzer. The antibacterial activities of Rif@CS/Alg-NPs were investigated against three species of bacteria namely Escherichia coli (E. coli), Pseudomonas aeruginosa (PA) and Bacillus haynesii (BH). Rif@CS/Alg-NPs exhibited outstanding antibacterial activities against E. coli, P. aeroginosa and Bacillus haynesii (BH) with 24 mm, 30 mm and 34 mm zone of inhibitions, resp. Cytotoxicity of Rif@CS/Alg-NPs was also evaluated against human lung adenocarcinoma cell line A549 and found to be nontoxic. The drug release behavior of Rif@CS/Alg-NPs was investigated at different pH levels and maximum drug release (80%) was achieved at pH (7.2). The drug release kinetic data followed the Higuchi (R² = 0.9963) kinetic model, indicating the drug release from Rif@CS/Alg-NPs as a square root of time-dependent process and diffusion controlled. Current research provides a cost-effective and green approach toward the synthesis of Rif@CS/Alg-NPs for its antibacterial applications. In the experiment, the researchers used many compounds, for example, (2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(Acetyloxy)-5,6,21,23-tetrahydroxy-27-methoxy-2,4,11,16,20,22,24,26-octamethyl-2,7-(epoxypentadeca[1,11,13]trienimino)benzofuro[4,5-e]pyrido[1,2-a]benzimidazole-1,15(2H)-dione (cas: 80621-81-4SDS of cas: 80621-81-4).

(2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(Acetyloxy)-5,6,21,23-tetrahydroxy-27-methoxy-2,4,11,16,20,22,24,26-octamethyl-2,7-(epoxypentadeca[1,11,13]trienimino)benzofuro[4,5-e]pyrido[1,2-a]benzimidazole-1,15(2H)-dione (cas: 80621-81-4) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. Introduction of benzofurans in organic synthesis, particularly drug synthesis, involves generally the use of their metalated species as nucleophiles in addition reactions or in metal-catalysed cross-coupling reactions.SDS of cas: 80621-81-4

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem