Using Cc1ccc(OC2CCN(C(=O)C(=O)c3c[nH]c4ccccc34)CC2)cc1 to produce Cc1ccc(OC2CCN(CCc3c[nH]c4ccccc34)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.