Using CCOC(=O)CS/C(C)=C1\C(=O)C[C@@H]2[C@H]1C2(C)C to produce CCOC(=O)c1sc(C)c2c1C[C@@H]1[C@H]2C1(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.