Using CC[C@H](C)[C@H](NC(=O)OC(C)(C)C)C(=O)O, O=C(OCc1ccccc1)[C@@H]1CCCN1 to produce CC[C@H](C)[C@H](NC(=O)OC(C)(C)C)C(=O)N1CCC[C@H]1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.