SMILES: C1CN2[C@@H](CC2=O)SC1
Description: The molecule is an organic heterobicyclic compound that consists of (6R)-5-thia-1-azabicyclo[4.2.0]octane bearing an 8-keto substituent. The parent of the class of cephams. It is a natural product fundamental parent, a member of cephams and a saturated organic heterobicyclic parent.