Calculation of the Double Bond Distribution in Isomerized Methyl Oleate

✍ Scribed by van der Plank, P.

• Publisher: John Wiley and Sons
• Year: 1978
• Weight: 317 KB
• Volume: 80
• Category: Article
• ISSN: 0931-5985
• DOI: 10.1002/lipi.19780801003

✦ Synopsis

constituents. The presence of A*(l*)-isomers of cycloartenol and 24-methylenecycloartanol, parkeol and 24-methylenelanost-9( 1 I)-en-3p-ol 14, respectively, has also been reported in shea butter from the kernels of Butyrospermum ParRii (Sapotaceae). Among the other triterpenes in B. napus seeds, three pentacyclic triterpenes, a-amyrin, P-amyrin and lupeol, could be identified. The presence of butyrospermol, which was identified. before in rapeseed oil 79 O, could not be recognized.

Three sterols possessing 24-methylene group in the side chain, obtusifoliol, cycloeucalenol and gramisterol, are ' the major components of the 4-monomethylsterol fraction. Two minor constituents, 4a,14a,24-trimethylcholesta-8,24-dien-3p-ol and 4a,I4a,24-trimethyl-gB,19cyclocholest-24-en-3~-ol, are the new sterols quite recently identified in the B. napus seeds'. Biogenetic importance of such 24-alkylated AL4-sterols has well been discussed M-SO. 4a,24-Dimethylcholest-8-en-3~-ol, tentatively identified in this study, was found before in coffee beans al , in a red alga, Porphyridium cruentum and in some parasitic plants =.