Using COC(=O)c1ccc(CSc2c(Cl)ccc3c2CCN(C(=O)OC(C)(C)C)CC3Cl)nc1 to produce CC(C)(C)OC(=O)N1CCc2ccc(Cl)c(SCc3ccc(C(=O)O)cn3)c2CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.