2-(carboxy(2-phenoxyacetamido)methyl)-5,5-dimethylthiazolidine-4-carboxylic acid;2-[CARBOXY-[(2-PHENOXYACETYL)AMINO]METHYL]-5,5-DIMETHYL-THIAZOLIDINE-4 -CARBOXYLIC ACID;2-{Carboxy[(1-hydroxy-2-phenoxyethylidene)amino]methyl}-5,5-dimethyl-1,3-thiazolidine-4-carboxylic acid;Phenoxymethylpenicillin Potassium Impurity E;2-Thiazolidineacetic acid, 4-carboxy-5,5-dimethyl-alpha-((phenoxyacetyl)amino)-
