Using C=CCOc1c(OC)ccc(C(=O)Cc2c(Cl)cncc2Cl)c1OCC=C to produce C=CCOc1c(OC)ccc(C(=O)Cc2c(Cl)cncc2Cl)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.