Using NO, O=C1C=C(c2ccc(N3CCCC3)cc2)c2ccccc2C1=O to produce O=C1C(=NO)C=C(c2ccc(N3CCCC3)cc2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.