(2S,3S)-2-(2-Bromoethyl)-3-ethenyl-2-methylcyclopentanone 2,2-dimethyl-1,3-propanediyl acetal

2-((1R,2R)-1,8,8-Trimethyl-2-vinyl-6,10-dioxa-spiro[4.5]dec-1-yl)-ethanol

trans-2-(β-(p-tosyloxy)ethyl)-2-methyl-3-vinylcyclopentanone 2,2-dimethylpropanediol ketal

(3aR,4R,7aR)-4-[2-(3-Methoxy-phenyl)-ethyl]-7a-methyl-1-methylene-octahydro-inden-5-one