(4S,5S)-4-(tert-Butyl-dimethyl-silanyloxy)-3,5-dimethyl-cyclopent-2-enone

(4R,5S)-4-(tert-Butyl-dimethyl-silanyloxy)-5-methyl-cyclopent-2-enone

(1S,2S,3S,5R)-2-Methyl-6-oxabicyclo<3.1.0>hexan-3-ol

1-[(7R,8S,9S)-9-((S)-2-Benzenesulfinyl-1-methyl-ethyl)-8-methyl-6,10-dioxa-spiro[4.5]dec-7-yl]-ethanone

(1S,2S)-(+)-1-hydroxy-2-methyl-3-cyclopentene