Using N[C@@H](CS)C(=O)O, COC(=O)SCCCN1C(=O)NCC1c1ccccc1 to produce N[C@@H](CSSCCCN1C(=O)NCC1c1ccccc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.