B. Ramarosonraonizafinimanana et al., OCCURRENCE OF 5-ALPHA-CHOLESTA-7,24-DIEN-3-BETA-OL AND 23-DEHYDROLOPHENOL IN THE BEAN LIPIDS OF VANILLA-MADAGASCARIENSIS, Journal of the American Oil Chemists' Society, 75(10), 1998, pp. 1325-1328
Eleven 4-desmethylsterols, four 4,4-dimethylsterols, and twelve 4-meth
ylsterols were identified in Vanilla madagascariensis beans. The 4-des
methylsterol fraction was characterized by a high level of 5 alpha-cho
lesta-7,24(25)-dien-3 beta-ol (35.3%). The 4-methylsterol fraction was
characterized by a high level of 31-norcycloartenol (57.5%) and the p
resence of 23-dehydrolophenol (9.4%). Cycloartenol (72.9%), cyclosadol
(12.7%), parkeol (9.7%), and 24-dehydrotirucallol (4.7%) were identif
ied in the 4,4-dimethylsterol fraction.