8,9-dihydroxy-β-bromopicrotoxinic acid methyl ester

(1R,5S,8R,9S,11R)-9-(bromomethyl)-4,11-bis(hydroxymethyl)-5,9-dimethyl-10-oxotricyclo<6.2.1.01.5>undec-3,6-diene

8,9-deoxy-β-bromopicrotoxinic acid methyl ester

(1R,2R,4R,5S,6R,7R,10S,11R)-2,4,5,11-tetrahydroxy-10-isopropenyl-6-methyl-9-oxo-8-oxatricyclo<5.2.2.02,6>undecane-5-carboxylic acid methyl ester

(1R,3R,5S,8R,9S,11R)-9-(bromomethyl)-3-<(tert-butyldimethylsilyl)oxy>-11-<<(tert-butyldimethylsilyl)oxy>methyl>-5,9-dimethyl-4-methylidine-10-oxotricyclo<6.2.1.01.5>undec-6-ene