Using CC(C)(C)OC(=O)CC(CCCSC(c1ccccc1)(c1ccccc1)c1ccccc1)C(=O)O, CC(C)(C)OC(=O)C[C@H](N)C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)CC(CCCSC(c1ccccc1)(c1ccccc1)c1ccccc1)C(=O)NC(CC(=O)OC(C)(C)C)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.