(4R,4aR,7S,8R,8aR)-8-Azido-4-(bis-phenylsulfanyl-methyl)-2,2-dimethyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-ol

(3aR,3bR,7S,7aR,8aR)-7-Azido-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5]furo[3,2-b]pyran-6-one

(3aR,5R,6R,6aR)-6-(allyloxy)-tetrahydro-2,2-dimethyl-5-vinylfuro[2,3-d][1,3]dioxole

(3aR,3bR,7aR,8aR)-2,2-dimethyl-3a,5,7a,8a-tetrahydro-3bH-1,3,4,8-tetraoxa-cyclopenta[a]indene