Using COc1cc(OC)cc(OC[C@@H]2[C@@]3(C)CCCC(C)(C)[C@@H]3CC[C@@]2(C)O)c1 to produce COc1cc(OC)c2c(c1)OC[C@@H]1[C@@]3(C)CCCC(C)(C)[C@@H]3CC[C@@]21C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.