carbapenems carbapenem (5R)-1-azabicyclo[3.2.0]hept-2-en-7-one 109.053 109.12592 2,3-didehydro-1-carbapenam An organic heterobicyclic compound that consists of (5R)-1-azabicyclo[3.2.0]hept-2-ene bearing a 7-keto substituent. The parent of the class of carbapenems. C6H7NO CHEBI:46765 InChI=1S/C6H7NO/c8-6-4-5-2-1-3-7(5)6/h1,3,5H,2,4H2/t5-/m1/s1 YZBQHRLRFGPBSL-RXMQYKEDSA-N [H][C@]12CC=CN1C(=O)C2 chebi_ontology