Using CS(=O)(=O)Cl, CCOC(=O)C(CO)(CC1CCCCC1)C(=O)OCC to produce CCOC(=O)C(COS(C)(=O)=O)(CC1CCCCC1)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.