Using CCOC(=O)n1c(SCc2cc(OC)ccn2)nc2cscc21, O=C([O-])O to produce CCOC(=O)n1c(S(=O)Cc2cc(OC)ccn2)nc2cscc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.