Task: Answer the following question about the molecule with SMILES O=C1CC2CC=CN12.
Request: Please describe this drug.
Result: A group of beta-lactam antibiotics in which the sulfur atom in the thiazolidine ring of the penicillin molecule is replaced by a carbon atom. THIENAMYCINS are a subgroup of carbapenems which have a sulfur atom as the first constituent of the side chain.
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
O=C1CC2CC=CN12
C1C=CN2C1CC2=O
1-azabicyclo[3.2.0]hept-2-en-7-one
Please describe this drug.