Using C=CCO, COC(=O)CCc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1 to produce C=CCOC(=O)CCc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.