In previous studies, the compounds ergosterol, ergostane, and cholestane
have been isolated from S.
The coupling constants of two oxymethine protons at I' 4.18 (1H, ddd, J = 10.4, 8.8 and 3.8 Hz) and 3.80 (1H ddd, J = 11.1, 8.8 and 5.7 Hz) suggested 1,2-glycolic functions with a trans configuration and 2[alpha],3[beta]-dihydroxy cholestane
type skeleton [9-10].
Lanzotti, "Spirostane, furostane and cholestane
saponins from Persian leek with antifungal activity," Food Chemistry, vol.
New antifungal cholestane
and aldehyde derivatives from the red alga Laurencia papillosa.
(5) These steroids have stigmastane (C29), cholestane
(C27) and ergostane (C28) skeletons, respectively.
The residue was dissolved again in 2 mL hexane containing 0.2 mg [mL.sup.-1] 5-[alpha] cholestane
internal standard (IS) (Sigma, USA).
CTX disease is an abnormality of 26-hydroxylation of cholestane
The more active azasteroid antibiotics were cholestane
He criticizes its failure to survey how the animals managed their sterol supplements with blood-cholesterol measurements, and the omission in the oxides dose of cholestane
triol--a cholesterol oxide now known to be highly atherogenic.
Potent growth inhibitory activity of a novel Ornithogalum cholestane
glycoside on human cells: induction of apoptosis in promyelocytic lcukemia HL-60 cells.
The residue was dissolved again in 2 ml hexane containing 0.2 mg/ml 5-[alpha] cholestane
internal standard (IS) (Sigma, EUA).
The ratio of the areas of cholesterol and 5-[alpha] cholestane
was plotted against the cholesterol concentration for injected volumes of 0.0; 2.0; 3.0; 4.0, and 5.0 [micro]l.