PROPICILLIN

(1-phenoxypropyl)penicillin

3,3-dimethyl-7-oxo-6-[2-(phenoxy)butanoylamino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

7-keto-3,3-dimethyl-6-[2-(phenoxy)butanoylamino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

(2S,5β)-3,3-Dimethyl-7-oxo-6α-[(1-oxo-2-phenoxybutyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2β-carboxylic acid