Using CCCc1c(OCc2ccccc2)ccc(C(C)=O)c1OCCCC(=O)OCC to produce CCCc1c(O)ccc(C(C)=O)c1OCCCC(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.