Electric Literature of 496-41-3, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 496-41-3, molcular formula is C9H6O3, introducing its new discovery.
A new series of heteroaromatic GBR 12935 [1-[2-(diphenylmethoxy)ethyl]- 4-(3-phenylpropyl)-piperazine] (1) and GBR 12909 [1-[2-[bis(4- fluorophenyl)methoxy]ethyl]-4-(3-phenylpropyl)-piperazine] (2) analogs was synthesized and evaluated as dopamine transporter (DAT) ligands. Analogs 5- 16, in which the benzene ring in the phenylpropyl side chain of the GBR molecule had been replaced with a thiophene, furan, or pyridine ring, exhibited high affinity and selectivity for the DAT vs serotonin transporter (SERT) and stimulated locomotor activity in rats in a manner similar to the parent compound 2. In cocaine and food self-administration studies in rhesus monkeys, both thiophene-containing (6 and 8) and pyridine-containing (14 and 16) derivatives displayed potency comparable to 2 in decreasing the cocaine- maintained responding at the doses tested (0.3, 1.7, and 3 mg/kg). However, these compounds did not produce the degree of separation between food- and cocaine-maintained responding that was seen with 2. Among the bicyclic fused- ring congeners 17-38, the indole-containing analog of 2, 22, showed the greatest affinity for binding to the DAT, with IC50 = 0.7 nM, whereas the corresponding indole-containing derivative of 1, 21, displayed the highest selectivity (over 600-fold) at this site vs the SERT site.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 496-41-3 is helpful to your research. Electric Literature of 496-41-3
Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H1897O – PubChem