Using CCCCc1nc(Cl)c(C=O)n1Cc1ccc(-c2ccccc2C(=O)OC(C)(C)C)cc1, NO to produce CCCCc1nc(Cl)c(C=NO)n1Cc1ccc(-c2ccccc2C(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.