Question: What is the first recorded year of approval for this drug?
Constraint: The Compound has the SMILES CCC1(CC)C(=O)NCC(C)C1=O.
Result: 1982
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
CCC1(CC)C(=O)NCC(C)C1=O
CCC1(CC)C(=O)NCC(C)C1=O
3,3-diethyl-5-methylpiperidine-2,4-dione
What is the first recorded year of approval for this drug?