Using O=C(Nc1nccs1)C1=C(O)c2ccccc2N(c2ccccc2)C1 to produce O=C(Nc1nccs1)c1cn(-c2ccccc2)c2ccccc2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.