Using COC(=O)C1=C(C)NC2=C(COC2=O)C1c1ccc(Cl)cc1 to produce COC(=O)c1c(C)nc2c(c1-c1ccc(Cl)cc1)COC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.