Question: What is the first recorded year of approval for this drug?
Constraint: The Chemical has the SMILES CC(O)(P(=O)([O-])O)P(=O)([O-])O.[Na+].[Na+].
Answer: 1977
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
CC(O)(P(=O)([O-])O)P(=O)([O-])O.[Na+].[Na+]
CC(O)(P(=O)([O-])O)P(=O)([O-])O.[Na+].[Na+]
disodium;hydroxy-[1-hydroxy-1-[hydroxy(oxido)phosphoryl]ethyl]phosphinate
What is the first recorded year of approval for this drug?
1977