Using C=C(C)C(=O)OC(C)(C)C, COc1c(I)c(=O)c2ccc(Cl)cc2[nH]c1=O to produce COc1c(/C=C/C(=O)OC(C)(C)C)c(=O)c2ccc(Cl)cc2[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.