title: Degradation of sodium penicillin solution in presence of alkali metal salts.
mesh_terms: D002586:Cesium; D003300:Copper; D004355:Drug Stability; D008094:Lithium; D010400:Penicillin G; D011188:Potassium; D000644:Quaternary Ammonium Compounds; D012413:Rubidium; D012964:Sodium; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000644:Quaternary Ammonium Compounds; D012996:Solutions; D002586:Cesium; D003300:Copper; D008094:Lithium; D012964:Sodium; D012413:Rubidium; D010400:Penicillin G; D011188:Potassium