penicillin 6-[(2-amino-1-oxo-2-phenylethyl)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 349.110 349.406 AVKUERGKIZMTKX-UHFFFAOYSA-N C16H19N3O4S CC1(C(N2C(S1)C(C2=O)NC(=O)C(C3=CC=CC=C3)N)C(=O)O)C CHEBI:94334 InChI=1S/C16H19N3O4S/c1-16(2)11(15(22)23)19-13(21)10(14(19)24-16)18-12(20)9(17)8-6-4-3-5-7-8/h3-7,9-11,14H,17H2,1-2H3,(H,18,20)(H,22,23) LINCS:LSM-4982 chebi_ontology