Using COc1ccc(C=O)c(OC)c1OC, COC(=O)CC1=C(C)Cc2ccc(OC)cc21 to produce COc1ccc2c(c1)C(CC(=O)O)=C(C)C2=Cc1ccc(OC)c(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.