(-)-9(Z)-(9R,10R)-9-(5-hydroxy-3-methylpent-3-en-1-ynyl)-3,3,8,8,10-pentamethyl-1,5-dioxaspiro<5,5>undecan-9-ol

(+)-1(Z)-(1R,4R,6S)-4-tert-butyldimethylsiloxy-1-(5-hydroxy-3-methylpent-3-en-1-ynyl)-2,2,6-trimethylcyclohexanol