Q: What is the first recorded year of approval for this drug?
 The Compound can be represented with the SMILES O.O.O=C([O-])CN(CCN(CC(=O)[O-])CC(=O)O)CC(=O)O.[Na+].[Na+].
Answer: 1982
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O.O.O=C([O-])CN(CCN(CC(=O)[O-])CC(=O)O)CC(=O)O.[Na+].[Na+]
O.O.O=C([O-])CN(CCN(CC(=O)[O-])CC(=O)O)CC(=O)O.[Na+].[Na+]
disodium;2-[2-[carboxylatomethyl(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetate;dihydrate
What is the first recorded year of approval for this drug?
1982