Using O=Cc1cccnc1Nc1cc(Cl)cc(Cl)c1, COC(=O)CC(OC)OC to produce COC(OC)c1cc2cccnc2n(-c2cc(Cl)cc(Cl)c2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.