Using CCOCc1nc2cnc3ccccc3c2n1CC1(O)CC1, C=CS(C)(=O)=O to produce CCOCc1nc2cnc3ccccc3c2n1CC1(OCCS(C)(=O)=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.