Using C[C@H](CO)[C@H]1CC[C@H]2C3=C(CC[C@]12C)[C@@]1(C)CC[C@H](O)C[C@@H]1C(=O)O3 to produce C=C(C)COC[C@@H](C)[C@H]1CC[C@H]2C3=C(CC[C@]12C)[C@@]1(C)CC[C@H](OCOC)C[C@@H]1C(=O)O3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.