is conjugate acid of penicillin propicillin (2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(2-phenoxybutanoyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 378.125 378.44300 6beta-(2-phenoxybutanamido)-2,2-dimethylpenam-3alpha-carboxylic acid Beilstein:1092883 C18H22N2O5S CAS:551-27-9 CHEBI:52429 Drug_Central:2297 HOCWPKXKMNXINF-XQERAMJGSA-N InChI=1S/C18H22N2O5S/c1-4-11(25-10-8-6-5-7-9-10)14(21)19-12-15(22)20-13(17(23)24)18(2,3)26-16(12)20/h5-9,11-13,16H,4H2,1-3H3,(H,19,21)(H,23,24)/t11?,12-,13+,16-/m1/s1 Patent:GB877120 [H][C@]12SC(C)(C)[C@@H](N1C(=O)[C@H]2NC(=O)C(CC)Oc1ccccc1)C(O)=O chebi_ontology propicilina propicillin propicilline propicillinum propicillin(1-)