[(1R,5R,7S,8R)-7-Bromomethyl-8-(tert-butyl-dimethyl-silanyloxymethyl)-4,7-dimethyl-6-oxa-bicyclo[3.2.1]oct-3-en-5-yl]-acetonitrile

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

methyl (3aS,3bR,4S,5R,6R,7S,7aR,8aR)-5,7a-dihydroxy-2,2,3b-trimethyl-9-oxo-6-(prop-1-en-2-yl)octahydro-3aH-4,7-(epoxymethano)indeno[1,2-d][1,3]dioxole-3a-carboxylate