meso-4β,6-diacetoxy-2,2-dimethyl-3αβ,5,6α,6αβ-tetrahydro-4H-cyclopenta-1,3-dioxole

methyl 7-iodohept-5-enoate

(+)-(3As,6as)-3a,6a-二氢-2,2-二甲基-4H-环戊并-1,3-二氧代-4-酮

(+/-)-2,2-dimethyl-3αβ,6αβ-dihydro-4H-cyclopenta-1,3-dioxol-4-one