Using CCCCCCn1c(=O)c(C=O)c(OC)c2cc(C)ccc21, NO to produce CCCCCCn1c(=O)c(C=NO)c(OC)c2cc(C)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.