Using CN, C[C@]12CC[C@@H]3c4ccc(O)cc4CC[C@H]3[C@@H]1C[C@@H](O)C2=O to produce CN[C@H]1[C@H](O)C[C@H]2[C@@H]3CCc4cc(O)ccc4[C@H]3CC[C@@]21C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.