Using CCOC(=O)c1cc2c(o1)c(=O)[nH]c1c(N3CCCCC3)cccc12 to produce O=Cc1cc2c(o1)c(=O)[nH]c1c(N3CCCCC3)cccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.