Using CCCCCCCCCCCCc1ccc2c(C(N)=O)c(OC(C)=O)ccc2c1 to produce CCCCCCCCCCCCc1ccc2c(C(N)=O)c(O)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.