(Z)-methyl trans-4,5-(isopropylidenedioxy)-2-hexenoate

2,2-Dimethyl-propionic acid (1R,2R,3R,4S)-8-oxo-3-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-bicyclo[2.2.2]oct-5-en-2-ylmethyl ester

2,2-Dimethyl-propionic acid (1S,2R,3R,4S,7R)-5-oxo-7-p-tolyloxythiocarbonyloxy-3-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-bicyclo[2.2.2]oct-2-ylmethyl ester

(1S,2R,3S,4S,7R)-7-(tert-Butyl-dimethyl-silanyloxy)-5-oxo-3-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-bicyclo[2.2.2]octane-2-carboxylic acid methyl ester

acetic acid (1S,4R)-(-)-4-hydroxycyclohex-2-enyl ester