Using O=C1NC(=O)c2ccccc21, COc1nc(CO)cc(C)c1C#N to produce COc1nc(CN2C(=O)c3ccccc3C2=O)cc(C)c1C#N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.