2,2-dimethyl-4-oxooct-7-enal

(6R*,7R*)-8,8-dimethyl-7-(2-hydroxyethyl)-6-(2-methyl-1,3-dioxolan-2-yl)methyl-1,4-dioxaspiro<4.4>nonane

4,4-dimethyl-2-(2-methyl-1,3-dioxolan-2-yl)methylcyclopent-2-en-1-one

(2R*,3R*)-4,4-dimethyl-2-(2-methyl-1,3-dioxolan-2-yl)methyl-3-vinylcyclopentan-1-one

(6R,7R)-8,8-Dimethyl-6-(2-methyl-[1,3]dioxolan-2-ylmethyl)-7-vinyl-1,4-dioxa-spiro[4.4]nonane