Using Nc1ccc(C(=O)NCc2ccc(Cc3cccc(Cl)c3)s2)cn1, CCOC(=O)NCN[C@H](C(=O)O)[C@@H](C)CC to produce COCNc1ccc(C(=O)NCc2ccc(Cc3cccc(Cl)c3)s2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.