Using C[S+](C)C, C[C@]12CC(=O)C[C@@H]1C[C@H]1[C@@H](CC[C@H]3C[C@H](O)CC[C@@H]31)C2 to produce C[C@@]12C[C@@H]3CC[C@H]4C[C@H](O)CC[C@@H]4[C@H]3C[C@H]1CC[C@]21CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.