sulbactam pivoxyl 347.104 347.386 C14H21NO7S CAS:69388-79-0 CHEBI:135467 Drug_Central:2493 InChI=1S/C14H21NO7S/c1-13(2,3)12(18)22-7-21-11(17)10-14(4,5)23(19,20)9-6-8(16)15(9)10/h9-10H,6-7H2,1-5H3/t9-,10+/m1/s1 N12C(C[C@]1(S(C([C@@H]2C(=O)OCOC(C(C)(C)C)=O)(C)C)(=O)=O)[H])=O OHPVYKXTRACOSQ-ZJUUUORDSA-N chebi_ontology sulbactam pivoxil pivaloyloxymethyl ester penicillanic acid ester