Using CCCCON=O, COc1cc2c(cc1C(=O)N(C)C)C(=O)CC2 to produce COc1cc2c(cc1C(=O)N(C)C)C(=O)C(=NO)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.