1-((3R,4S,5R)-4,5-dihydroxypiperidin-3-yl)pyrimidine-2,4(1H,3H)-dione

(3R,4S,5R)-5-(6-amino-9H-purin-9-yl)piperidine-3,4-diol

tert-butyl (3R,4S,5R)-3-((2,5-diamino-6-chloropyrimidin-4-yl)amino)-4,5-dihydroxypiperidine-1-carboxylate