The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Testing of the antiphlogistic effect of antirheumatic drugs》. Authors are Seidel, K.; Eckstein, M..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+]).Name: Sodium 4-butyl-3,5-dioxo-1,2-diphenylpyrazolidin-4-ide. Through the article, more information about this compound (cas:129-18-0) is conveyed.
Various anti-rheumatic drugs were measured for their antiphlogistic activity on human skin erythemas induced by uv light. Prednisone (30 mg. per os, daily), wofapyrine (1.5 g./day, i.m.), nicopyrone (1.5 g.) plus metamizol (1.5 g.) (1 tablet daily), nicopyrone (1.2 g.) plus prednisone (9.0 mg.) (1 tablet daily), and nicopyrone (1.2 g.) plus prednisone (4.5 mg.) (1 tablet daily), all for 4 days, reduced the skin inflammation inducible by uv light by 42.8, 41.1, 41.4, 46.2, and 43.6%, resp. 16 references
If you want to learn more about this compound(Sodium 4-butyl-3,5-dioxo-1,2-diphenylpyrazolidin-4-ide)Name: Sodium 4-butyl-3,5-dioxo-1,2-diphenylpyrazolidin-4-ide, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(129-18-0).
Reference:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem