Using COc1ccc2cccc(C=CN3C(=O)c4ccccc4C3=O)c2c1 to produce COc1ccc2cccc(CCN3C(=O)c4ccccc4C3=O)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.