Using O=C(OCc1ccccc1)N1CCC(C(=O)N2CCc3c([nH]c4ccccc34)C2)CC1 to produce O=C(C1CCNCC1)N1CCc2c([nH]c3ccccc23)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.