Co-occurrence of °5- and °7-sterols in two gleditsia species. : A reassessment of the sterol composition in oils rich in °7 -sterols |
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| Authors: | Jacques Artaud Marie-Christine Iatrides Emile M Gaydou |
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| Institution: | 1. Institut Universitaire de Technologie, rue des Géraniums, 13337 Marseille Cedex 14, France;2. Laboratoire de Phytochimie, Ecole Supérieure de Chimie de Marseille, Rue Henri Poincaré, 13397 Marseille Cedex 13, France |
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| Abstract: | The composition of the sterol fraction of Gleditsia triacanthos, G. macracantha, Thea sinensis, Medicago sativa and Spinacia oleracea has been determined using GC and GC/MS. The sum of δ7-sterols ranges from 67 to 95%. Among them 24ξ-ethyl-5α-cholest-7,trans-22-dien-3β-ol (28–50%) and 24ξ-ethyl-5α-cholest-7-en-3β-ol (23–49%) are the major components. The co-occurrence of δ5- and δ7-sterols has been observed in all species. The possible biosynthetic pathway of the phytosterol nucleus leading to these sterols is discussed. |
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| Keywords: | Leguminosae seeds spinasterol To whom correspondence should be addressed |
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