(2R,3R,4R)-2-(((1,3-dihydroxypropan-2-yl)amino)methyl)pyrrolidine-3,4-diol

(2R,3R,4R)-1-(((2R,3R,4R)-3,4-dihydroxypyrrolidin-2-yl)methyl)-2-(hydroxymethyl)piperidine-3,4-diol

(7R,8R,8aR)-7,8-dihydroxyhexahydropyrrolo[1,2-a]pyrazin-4(1H)-one

(3S,7R,8R,8aR)-7,8-dihydroxy-3-methylhexahydropyrrolo[1,2-a]pyrazin-4(1H)-one

(3S,7R,8R,8aR)-7,8-dihydroxy-3-isobutylhexahydropyrrolo-[1,2-a]pyrazin-4(1H)-one