4,4,7-Trimethyl-octa-1,7-dien-3-ol

cis-5,8,8-trimethylbicyclo<3.3.0>oct-2-en-2-yl triflate

1-(2,5,5-trimethylcyclopent-1-en-1-yl)-3-(trimethylsilyl)prop-2-en-1-one