title: Kinetic demonstration of a metastable intermediate in isomerization of penicillin to penicillenic acid in aqueous solution.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007536:Isomerism; D007700:Kinetics; D010397:Penicillanic Acid; D010400:Penicillin G; D010406:Penicillins; D013844:Thiazoles
chemical_list: D010406:Penicillins; D013844:Thiazoles; D010397:Penicillanic Acid; D010400:Penicillin G