title: Comparative stabilities of ampicillin and hetacillin in aqueous solution.
mesh_terms: D000667:Ampicillin; D002850:Chromatography, Gel; D004355:Drug Stability; D007093:Imidazoles; D007259:Infrared Rays; D008970:Molecular Weight; D010397:Penicillanic Acid; D010406:Penicillins; D011108:Polymers; D013057:Spectrum Analysis; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D007093:Imidazoles; D010406:Penicillins; D011108:Polymers; D000667:Ampicillin; D010397:Penicillanic Acid