Using O=C1Cc2ccccc2N1, COc1ccc2c(c1)C(=O)CC2 to produce COc1ccc2c(c1)C(=C1C(=O)Nc3ccccc31)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.