Using CCOC(=O)/C=C/c1c(OC)ccc2cc(-c3cccc(OC)c3)ccc12 to produce COc1cccc(-c2ccc3c(/C=C/C(=O)O)c(OC)ccc3c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.