Using CCOC(=O)C(C)(C)SC(C)=O, CS(=O)(=O)OCC[C@H]1CCOC1 to produce CCOC(=O)C(C)(C)SCC[C@H]1CCOC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.