(3aS,9aR,9bS)-2,2,8,8-tetramethyl-3a,4,9a,9b-tetrahydro-6H-[1,3]dioxolo[4',5':5,6]benzo[1,2-d][1,3]dioxin-4-ol

((4S,5S)-5-((R)-2,2-dimethyl-5-methylene-1,3-dioxan-4-yl)-2,2-dimethyl-1,3-dioxolan-4-yl)methanol

(tert-butyldimethylsilanyloxy)-(2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-acetic acid methyl ester