Pencilloic G acid

benzylpenicilloic acid

2-Thiazolidineacetic acid, 4-carboxy-5,5-diMethyl-a-[(2-phenylacetyl)aMino]-

2-[(Phenylacetylamino)carboxymethyl]-5,5-dimethylthiazolidine-4-carboxylic acid

2-[1-(Phenylacetylamino)-2-hydroxy-2-oxoethyl]-5,5-dimethylthiazolidine-4-carboxylic acid

(2R)-5,5-Dimethyl-2α-[(R)-(phenylacetylamino)carboxymethyl]thiazolidine-4β-carboxylic acid