(R*,R*)-2,3-Mercaptobutanedicarbothioic acid (R*,S*)-2,3-Dimercaptobutanebis(thioic)acid 11096-09-6 Butanebis(thioic) acid, 2,3-dimercapto-, (R*,S*)- Butanedicarbothioic acid, 2,3-mercapto-, (R*,R*)- meso-Dimercaptosuccinic acid dithiole