Question: Please describe this drug.
 The Molecule has the SMILES O=C1CC2CC=CN12.
Answer: 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.
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O=C1CC2CC=CN12
C1C=CN2C1CC2=O
1-azabicyclo[3.2.0]hept-2-en-7-one
Please describe this drug.