has functional parent penamecillin 406.120 406.455 A penicillanic acid ester that is the acetoxymethyl ester of benzylpenicillin. It is a prodrug for benzylpenicillin. Acetoxymethyl benzylpenicillanate Benzylpenicillin acetoxymethyl ester C19H22N2O6S C=1C=CC=C(C1)CC(N[C@]2([C@@]3(N(C2=O)[C@](C(S3)(C)C)(C(OCOC(=O)C)=O)[H])[H])[H])=O CAS:983-85-7 CHEBI:131733 Drug_Central:2077 InChI=1S/C19H22N2O6S/c1-11(22)26-10-27-18(25)15-19(2,3)28-17-14(16(24)21(15)17)20-13(23)9-12-7-5-4-6-8-12/h4-8,14-15,17H,9-10H2,1-3H3,(H,20,23)/t14-,15+,17-/m1/s1 KEGG:D05406 NLOOMWLTUVBWAW-HLLBOEOZSA-N PMID:15214080 PMID:19108231 PMID:4959939 PMID:6791463 Patent:GB1003479 Patent:US3250679 Reaxys:5164412 Wikipedia:Penamecillin acetoxymethyl (2S,5R,6R)-3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate chebi_ontology penamecilina penamecillin penamecilline penamecillinum benzylpenicillin penicillanic acid ester semisynthetic derivative