(3aS,6R,6aR)-6-((tert-butyldimethylsilyl)oxy)-2,2-dimethyldihydro-3aH-cyclopenta[d][1,3]dioxol-4(5H)-one

(3aR,4'R,5'R,6aR)-4',5'-bis((benzyloxy)methyl)-2,2-dimethyl-3a,6a-dihydrospiro[cyclopenta[d][1,3]dioxole-4,2'-[1,3]dioxolane]

(3aR,4S,6R,6aS)-6-(4-Methoxy-phenoxy)-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-ol

(3aR,7aS)-2,2,4-trimethyl-3a,7a-dihydro-1,3-benzodioxole