PubMed Health⌕ Search

Biomedical subjects

K Jewers

Publications and source records attributed to K Jewers.

13 recordsLinked to original sources
PubMed1980

Configurational assignments to spirostan-3-ols by mass spectrometry.

A study of the degree of water elimination from ions derived from spirostan-3-ols by electron bombardment has shown that the loss is greatest from those ions produced by the 5 beta-spirostan-3 alpha-ols, less from the 5 beta-spirostan-3 beta-ols and the 5 alpha-spirostan-3 alpha-ols, which give losses of the same order of magnitude; and least from the 5 alpha-spirostan-3 beta-ols. The extent of water elimination can be used to help characterise spirostan-3-ols isolated from plant materials.

Chemical Phenomena↗
PubMed1980

Ruizgenin, a new steroidal sapogenin diol from Agave lecheguilla.

From the leaves of Agave lecheguilla Torrey, two steroidal sapogenin diols have been isolated. Mass spectral, infra-red and nuclear magnetic resonance data of these two compounds showed them to be (25R)-spirost-5-ene-2 alpha, 3 beta-diol (yuccagenin) and (25R)-5 beta-spirostane-3 beta, 6 alpha-diol. The latter is a new compound to which the trivial name ruizgenin has been given.

Chromatography, Thin Layer↗