Using O=C1c2c(OCc3ccccc3)c(=O)nc(CC3(c4ccc(Cl)cc4)CCCC3)n2CCN1C1CC1 to produce O=C1c2c(O)c(=O)nc(CC3(c4ccc(Cl)cc4)CCCC3)n2CCN1C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.