PSI-7977 5MG. PSI-7977, CAS number: 1190307-88-0, MF: C22H29FN3O9P, MW: 529. 45, Purity: greater than or equal to 98%, Appearance: White to off-white solid, Synonym: (2S)-isopropyl 2-(((((2R, 3R, 4R, 5R)-5-(2, 4-dioxo-3, 4-dihydropyrimidin-1(2H)-yl), Storage Conditions -20 deg C, Size: 5MG