Using COC(=O)CCCCCN1C[C@H](CN(C(=O)OC(C)(C)C)[C@H](C)c2cccc3ccccc23)[C@@H](c2ccccc2)C1 to produce C[C@H](c1cccc2ccccc12)N(C[C@H]1CN(CCCCCC(=O)O)C[C@@H]1c1ccccc1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.