Q: What is the first recorded year of approval for this drug?
Constraint: The Chemical can be represented with the SMILES O=C([O-])c1ccccc1.[Na+].
Answer: 1987
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O=C([O-])c1ccccc1.[Na+]
O=C([O-])c1ccccc1.[Na+]
sodium;benzoate
What is the first recorded year of approval for this drug?