Using NO, CCOC(=O)N1c2cc(OC)c(OCc3ccccc3)cc2C(=O)CC1C to produce CCOC(=O)N1c2cc(OC)c(OCc3ccccc3)cc2C(=NO)CC1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.