Using NO, CCOC(=O)C1=C(c2ccccc2)c2ccc(OC)cc2C1=O to produce CCOC(=O)C1=C(c2ccccc2)c2ccc(OC)cc2C1=NO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.