Using CC(O)Cc1cc2c(cc1C(=NNc1ccc(Cl)nn1)c1ccc([N+](=O)[O-])cc1)OCO2 to produce CC1Cc2cc3c(cc2C(c2ccc([N+](=O)[O-])cc2)=NN1c1ccc(Cl)nn1)OCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.