Using O=C(NC1Cc2cnccc2NC1=O)OCc1ccccc1, OCc1ccccc1 to produce O=C(NC1Cc2cnccc2N(Cc2ccccc2)C1=O)OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.