Using CCCc1c(OCc2ccccc2)ccc2c(C)c(C(=O)c3ccc(OC)cc3)oc12 to produce CCCc1c(O)ccc2c(C)c(Cc3ccc(OC)cc3)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.