organic sulfide organic heterobicyclic compound biapenem (4R,5S,6S)-3-(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazol-4-ium-6-ylthio)-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (6S)-2-(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazol-4-ium-6-ylsulfanyl)-6-[(1R)-1-hydroxyethyl]-1beta-methyl-2,3-didehydro-1-carbapenam-3-carboxylate 350.105 350.39398 A carbapenem antibiotic in which the azetidine and pyrroline rings carry 1-hydroxymethyl and pyrazolo[1,2-a][1,2,4]triazolium-6-ylthio substituents respectively. BIPM Beilstein:5835582 Beilstein:7394875 Biapenem C15H18N4O4S CAS:120410-24-4 CHEBI:3089 Drug_Central:365 InChI=1S/C15H18N4O4S/c1-7-11-10(8(2)20)14(21)19(11)12(15(22)23)13(7)24-9-3-17-5-16-6-18(17)4-9/h5-11,20H,3-4H2,1-2H3/t7-,8-,10-,11-/m1/s1 KEGG:C11268 KEGG:D01057 MRMBZHPJVKCOMA-YJFSRANCSA-N PMID:28543395 PMID:8031067 [H][C@]12[C@@H](C)C(SC3Cn4cnc[n+]4C3)=C(N1C(=O)[C@]2([H])[C@@H](C)O)C([O-])=O biapenem chebi_ontology carbapenems