The amino acid nature of ampicillin and related penicillins.
D000596:Amino Acids; D000667:Ampicillin; D055598:Chemical Phenomena; D002621:Chemistry; D006863:Hydrogen-Ion Concentration; D010406:Penicillins; D012995:Solubility
D000596:Amino Acids; D010406:Penicillins; D000667:Ampicillin