Using N[C@@H]1c2ccccc2C[C@H]1NC(=O)c1cc2cc(Cl)sc2[nH]1, O=C1CC[C@@H](C(=O)O)O1 to produce O=C1CC[C@@H](C(=O)N[C@@H]2c3ccccc3C[C@H]2NC(=O)c2cc3cc(Cl)sc3[nH]2)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.