Using CC(=O)Oc1c(C(C)(C)C)cc2c(c1C(C)(C)C)CC(C)(COS(C)(=O)=O)O2, [I-] to produce CC(=O)Oc1c(C(C)(C)C)cc2c(c1C(C)(C)C)CC(C)(CI)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.