Using COc1ccc(OC[C@@H]2[C@@]3(C)CCCC(C)(C)[C@@H]3CC[C@@]2(C)O)c(OC)c1 to produce COc1cc(OC)c2c(c1)[C@]1(C)CC[C@H]3C(C)(C)CCC[C@]3(C)[C@H]1CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.