Using C[S+](C)C, C[C@]12C[C@H]3CC[C@H]4C[C@@H](O)CC[C@H]4[C@@H]3C[C@@H]1CCC2=O 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.