| Synonyms: | IMp. K (EP);AMpicillin EP IMpurity K;AMpicillin iMpurity K;(2R)-2-(2,2-dimethylpropanoylamino)-2-phenylacetic acid;Ampicillin Impurity 11（Ampicillin EP Impurity K）;Benzeneacetic acid, α-[(2,2-dimethyl-1-oxopropyl)amino]-, (R)- (9CI);Benzeneacetic acid, α-[(2,2-dimethyl-1-oxopropyl)amino]-, (R)- (9CI);J. (2S,5R,6R)-6-[(2,2-d i me th ylpropa noyl)a mi no]-3,3-d i me th yl-7-oxo-4-th i a -1-a za b i c yc lo[3.2.0]h e pta ne -2-c a rb oxyli c a c i d , |