Using O=S(Cl)Cl, COc1ccc(-c2ccc3c(c2C(=O)O)OCO3)cc1 to produce COc1ccc2c(c1)C(=O)c1c-2ccc2c1OCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.