Using CCCn1nc(C(=O)OCC)cc1CCN1C(=O)c2ccccc2C1=O to produce CCCn1nc(C(=O)O)cc1CCN1C(=O)c2ccccc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.