Using CCOC(=O)C1CCC(N2CCC(n3c(=O)[nH]c4ccccc43)CC2)CC1 to produce O=CC1CCC(N2CCC(n3c(=O)[nH]c4ccccc43)CC2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.