(2S,3R)-4-azido-2,3-O-isopropylidene-1,2,3-butanetriol

(2R,3R)-4-azido-2,3-O-isopropylidene-2,3-dihydroxybutanal

((4S,5R)-5-(azidomethyl)-2,2-dimethyl-1,3-dioxolan-4-yl)methyl butanoate

(3aS,4R,6aR)-N-benzyl-2,2-dimethyl-5-propionyltetrahydro-3aH-[1,3]dioxolo[4,5-c]pyrrole-4-carboxamide

(3aR,6aS)-2,2-dimethyl-3a,6a-dihydro-4H-[1,3]dioxolo[4,5-c]pyrrole