Using [Cl-], COc1ccc2c(c1)C(CCNC(C)=O)CN2C(C)=O to produce COc1cc2c(cc1Cl)N(C(C)=O)CC2CCNC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.