Using O=S(Cl)Cl, CCOC(=O)c1cc(C#Cc2ccc(S(=O)(=O)O)cc2)ccc1O to produce CCOC(=O)c1cc(C#Cc2ccc(S(=O)(=O)Cl)cc2)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.