Using CNc1ccccc1, O=C(O)c1c(O)c2ccccc2[nH]c1=O to produce CN(C(=O)c1c(O)c2ccccc2[nH]c1=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.