Using CCOC(=O)C=C(c1ccccc1)c1cc(OC)cc2[nH]ccc12 to produce CCOC(=O)CC(c1ccccc1)c1cc(OC)cc2[nH]ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.