Steroids from Harrisonia abyssinica

Abstract

In addition to the known sterols and ketosteroids β-sitosterol (24α-ethylcholest-5-en-3β-ol), stigmasterol (24α-ethylcholesta-5,22-dien-3β-ol), campesterol (24α-methylcholest-5-en-3β-ol), β-sitostenone (stigmast-4-en-3-one, 24α-ethylcholest-4-en-3-one), stigmastenone (stigmasta-4,22-dien-3-one, 24α-ethylcholesta-4,22-dien-3-one), campestenone (24α-methylcholest-4-en-3-one), and stigmasta-3,5-dien-7-one (24α-ethylcholesta-3,5-dien-7-one), the new steroids stigmasta-3,5,22-trien-7-one (24α-ethylcholesta-3,5,22-trien-7-one), and campesta-3,5-dien-7-one (24α-methylcholesta-3,5-dien-7-one) were isolated from the stem bark of Harrisonia abyssinica and identified by NMR and mass spectrometry.

Key words

Harrisonia abyssinica - Simaroubaceae - ketosteroids

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