(3R,4S,5R)-N-(4,5-dihydroxypiperidin-3-yl)acetamide

(3R,4S,5R)-5-amino-1-(tert-butoxycarbonyl)-3,4-dihydroxypiperidine

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

(3R,4S,5R)-5-[(5-amino-6-chloropyrimidin-4-yl)amino]-1-(tert-butoxycarbonyl)-3,4-dihydroxypiperidine

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