(1R,5S,6S)-5-(tert-Butyl-dimethyl-silanyloxy)-2-trimethylsilanyloxy-7-oxa-bicyclo[4.1.0]hept-2-ene

(1R,2S)-5,5-(Ethylendioxy)-2-hydroxycyclohexancarbonsaeure-ethylester

(1S)-4,4-ethylenedioxy-2-cyclohexen-1-ol

(1R,5S,6S)-5-(tert-Butyl-dimethyl-silanyloxy)-3-hydroxymethyl-3-phenylselanyl-7-oxa-bicyclo[4.1.0]heptan-2-one

(1aR,2S,2aS,3R,6S,6aR,7aR)-6a-(((tert-butyldimethylsilyl)oxy)methyl)-7-oxo-1a,2,2a,3,6,6a,7,7a-octahydro-3,6-methanonaphtho[2,3-b]oxiren-2-yl acetate