CAS 87721-89-9 appears in our catalog under these names: rel-(3aR,4R,7S,7aS)-2-(4-(4-(Pyrimidin-2-yl)piperazin-1-yl)butyl)hexahydro-1H-4,7-methanoisoindole-1,3(2H)-dione, 95%, Tandospirone Impurity 1, endo-Tandospirone, Tandospirone Impurity 2. Offered by: Chemat Brand, Hubei YoungXin, TRC, Biosynth. Available pack sizes: on request, 10mg, 25mg, 50mg, 100mg, 200mg.