| Synonyms: | AMpicillin EP IMpurity J;AMpicillin iMpurity J;Ampicillin Impurity 10;(2S,5R,6R)-3,3-dimethyl-7-oxo-6-pivalamido-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid;4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[(2,2-dimethyl-1-oxopropyl)amino]-3,3-dimethyl-7-oxo-, (2S,5R,6R)-;Ampicillin impurity 9/Ampicillin EP impurity J;Ampicillin Impurity 10（Ampicillin EP Impurity J）;(2S,5R,6R)-6-(2,2-dimethylpropanoylamino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid |