Using COc1c(C)c(Cc2ccc(O)c(C=O)c2)c(OC)c(OC)c1OC, COS(=O)(=O)OC to produce COc1ccc(Cc2c(C)c(OC)c(OC)c(OC)c2OC)cc1C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.