(+/-)-methyl (Z,E)-3-<(diethoxyphosphinyl)oxy>-7-(6,6-dimethyl-1,4,7-trioxaspiro<4.4>non-8-yl)-2,6-octadienoate

3-(6,6-dimethyl-1,4,7-trioxaspiro[4.4]nonan-8-yl)but-2-en-1-ol

(2Z,6E)-7-(6,6-Dimethyl-1,4,7-trioxa-spiro[4.4]non-8-yl)-3-methyl-octa-2,6-dienoic acid methyl ester

5-[(E,E)-7-bromo-1,5-dimethylhepta-1,5-dienyl]-2,2-dimethyl-3-pivaloyloxy-2,5-dihydrofuran

5-[(E,E)-7-hydroxy-1,5-dimethylhepta-1,5-dienyl]-2,2-dimethyl-3-pivaloyloxy-2,5-dihydrofuran