Using Cc1nc2c(c3c1[nH]c1ccccc13)C(=O)CC(C)C2, NO to produce Cc1nc2c(c3c1[nH]c1ccccc13)C(=NO)CC(C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.