Cooccurrence of C-24 alkylated Δ7- and Δ5-Sterols in the leaves of Beta vulgarisin the leaves of Beta vulgaris

Abstract

The 4-desmethylsterols from the leaves of Beta vulgaris are a mixture of Δ7-sterols (71%) and Δ5-sterols (29%). The Δ7-sterols isolated are spinasterol (24α-ethylcholesta-7,22-dien-3β-ol; 45%), 22-dihydrospinasterol (24α-ethylcholest-7-en-3β-ol; 24%), and avenasterol (24-ethylcholesta-7,24(28)-dien-3β-ol; 1.5%). The Δ5-sterols isolated are sitosterol (24α-ethylcholest-5-en-3β-ol; 15%), 24ζ-ethylcholesta-5,22-dien-3β-ol (7.5%), and 24ζ-methylcholest-5-en-3β-ol (7%). © 1983 American Oil Chemists' Society.