Using CC(C)(C)OC(=O)C(CCc1ccccc1)CC1(C(=O)O)CCCC1, CCOC(=O)[C@@H](N)CCSC to produce CCOC(=O)[C@H](CCSC)NC(=O)C1(CC(CCc2ccccc2)C(=O)OC(C)(C)C)CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.