The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Fibrinolytic activity of antiinflammatory drugs》. Authors are Gryglewski, R..The article about the compound:Sodium 4-butyl-3,5-dioxo-1,2-diphenylpyrazolidin-4-idecas:129-18-0,SMILESS:O=C(N(C1=CC=CC=C1)N2C3=CC=CC=C3)[C-](CCCC)C2=O.[Na+]).Product Details of 129-18-0. Through the article, more information about this compound (cas:129-18-0) is conveyed.
The fibrinolytic activity of antiinflammatory drugs was studied in vitro by incubating them with human plasma clots. Na salicylate, Na acetylsalicylate, and Na amidopyrine exhibited trace fibrinolytic activity, while Na phenylbutazone, Na mefenamate, and Na flufenamate showed full fibrinolytic activity.
There is still a lot of research devoted to this compound(SMILES：O=C(N(C1=CC=CC=C1)N2C3=CC=CC=C3)[C-](CCCC)C2=O.[Na+])Product Details of 129-18-0, and with the development of science, more effects of this compound(129-18-0) can be discovered.
Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem