Using NO, CCCC(=O)c1ccc(-c2cc3ccccc3c(N3CCN(CC)CC3)n2)cc1 to produce CCCC(=NO)c1ccc(-c2cc3ccccc3c(N3CCN(CC)CC3)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.