Using CC(=O)C(=O)N1CCC[C@H]1C(=O)O, COC(=O)[C@@H](N)CCSC to produce COC(=O)C(CCSC)N[C@@H](C)C(=O)N1CCC[C@H]1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.