title: Configurational assignments to spirostan-3-ols by mass spectrometry.
abstract: 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.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D007536:Isomerism; D013058:Mass Spectrometry; D010944:Plants / Q000032:analysis*; D012502:Sapogenins / Q000032:analysis*; D014867:Water
chemical_list: D012502:Sapogenins; D014867:Water