(4S,5R)-methyl 2,2-dimethyl-5-((methylsulfonyloxy)methyl)-1,3-dioxolane-4-carboxylate

(4S,5R)-isopropyl 5-(((4R,5S)-5-(aminomethyl)-2,2-dimethyl-1,3-dioxolane-4-carboxamido)methyl)-2,2-dimethyl-1,3-dioxolane-4-carboxylate

(4S,5R)-isopropyl 5-(azidomethyl)-2,2-dimethyl-1,3-dioxolane-4-carboxylate