Using COC(=O)c1ccc2[nH]c(C=Cc3ccc(OC)c(OC)c3)nc2c1 to produce COc1ccc(/C=C/c2nc3cc(C(=O)O)ccc3[nH]2)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.