Using COC(=O)c1cc(C=Cc2cc(OC)ccc2OC)ccc1NC(C)=O to produce COC(=O)c1cc(CCc2cc(OC)ccc2OC)ccc1NC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.