Using CI, C=C[C@H]([C@@H]1CCOC(C)(C)O1)[C@@H](O)C(=O)OC(C)(C)C to produce C=C[C@H]([C@@H]1CCOC(C)(C)O1)[C@@H](OC)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.