Using C[C@H](NC(=O)OC(C)(C)C)c1ccc(C(O)C2CCN(C(=O)OCc3ccccc3)CC2)cc1 to produce C[C@H](NC(=O)OC(C)(C)C)c1ccc(C(O)C2CCNCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.