[2R-[2?(R*),4?]]-2-[[(Aminophenylacetyl)amino]methyl]-5,5-dimethyl-4-thiazolidinecarboxylic Acid; Ampicillin EP Impurity F; (2R,4S)-2-[[[(2R)-Aminophenylacetyl]amino]methyl]-5,5-dimethyl-4-thiazolidinecarboxylic Acid; (2R,4S)-2-[[[(2R)-2-Amino-2-phenylacetyl]amino]methyl]-5,5-dimethyl-4-thiazolidinecarboxylic Acid.
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