Using O=C(Cl)OCC(Cl)(Cl)Cl, CC(C)(C)Cn1c(CN2C(=O)OC3(CCN(Cc4ccccc4)CC3)C2=O)cc2cnc(C#N)nc21 to produce CC(C)(C)Cn1c(CN2C(=O)OC3(CCN(C(=O)OCC(Cl)(Cl)Cl)CC3)C2=O)cc2cnc(C#N)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.