([(PrO)2P(S)]2O) Propyl thiopyrophosphate-d28; Thiodiphosphoric acid ([(HO)2P(S)]2O) Tetrapropyl Ester-d28; O,O,O,O-Tetrapropyl dithiopyrophosphate-d28; Tetra-n-propyl dithionopyrophosphate-d28; Tetra-n-propyl dithiopyrophosphate-d28,Aspon Stable Isotopes