Using COc1ccc(-c2[nH]c(/C=C(/C(=O)O)c3cccc(C)c3)nc2-c2ccc(Cl)c(Cl)c2)cc1 to produce COc1ccc(-c2[nH]c(CC(C(=O)O)c3cccc(C)c3)nc2-c2ccc(Cl)c(Cl)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.