Using CSCC[C@H](NC(=O)OCc1ccccc1)C(=O)O, CC(C)(C)OC(=O)N1C(=O)[C@@H]2C[C@H]1CC[C@@H]2N to produce CSCC[C@H](NC(=O)OCc1ccccc1)C(=O)N[C@H]1CC[C@@H]2C[C@H]1C(=O)N2C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.