1-{[(4S,5S)-5-ethynyl-2,2-dimethyl-1,3-dioxolan-4-yl]methyl}-2-(trimethylsilyl)pyrrolidine

(3aS,8aR,9aS)-2,2-dimethyl-9-methylene-octahydro[1,3]dioxolo[4,5-f]indolizine

2,2-dimethyl-hexahydro-1,3-dioxa-4a-aza-s-indacen-8-one

(4R,5S)-5-Ethynyl-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde

(3aS,8aR,9S,9aR)-9-(hydroxymethyl)-2,2-dimethyl-octahydro[1,3]dioxolo[4,5-f]indolizin-9-ol