Using CCOC(=O)[C@H](CCc1ccccc1)N[C@@H](C)C(=O)O, O=C(OC(c1ccccc1)c1ccccc1)[C@@H]1CC2(CN1)SCCS2 to produce CCOC(=O)[C@H](CCc1ccccc1)N[C@@H](C)C(=O)N1CC2(C[C@H]1C(=O)OC(c1ccccc1)c1ccccc1)SCCS2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.