Using CCOc1ccnc(Nc2n[nH]c3c2CNC3(C)C)n1, O=C(OC(Cl)(Cl)Cl)OC(Cl)(Cl)Cl to produce CCOc1ccnc(Nc2n[nH]c3c2CN(C(=O)Cl)C3(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.