cefuroxime pivoxetil 568.148 568.556 C23H28N4O11S C=1(N2[C@](SCC1COC(N)=O)([C@@](C2=O)(NC(/C(/C=3OC=CC3)=N\OC)=O)[H])[H])C(OC(C)OC(=O)C(C)(C)OC)=O CAS:100680-33-9 CHEBI:135833 Drug_Central:567 InChI=1S/C23H28N4O11S/c1-11(38-21(31)23(2,3)33-4)37-20(30)16-12(9-36-22(24)32)10-39-19-15(18(29)27(16)19)25-17(28)14(26-34-5)13-7-6-8-35-13/h6-8,11,15,19H,9-10H2,1-5H3,(H2,24,32)(H,25,28)/b26-14-/t11?,15-,19-/m1/s1 MGYPWVCKENORQX-KMMUMHRISA-N chebi_ontology carbamate ester cephalosporin