Using OCCO, C[C@H]1CC(=O)C=C2CC[C@H]3[C@@H]4CC[C@H](O)[C@@]4(C)CC[C@@H]3[C@]21C to produce C[C@H]1CC2(CC3=CC[C@H]4[C@@H]5CC[C@H](O)[C@@]5(C)CC[C@@H]4[C@]31C)OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.