Using CCOC(=O)CC1(C)CCc2c(C)cc(C)c(C)c2O1, O=S(=O)(O)Cl to produce CCOC(=O)CC1(C)CCc2c(C)c(S(=O)(=O)Cl)c(C)c(C)c2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.