Steroid glycosides of the leaves of Yucca aloifolia

Two new steroid glycosides have been isolated from the leaves of aloe yucca and their structures have been established. Glycosides B and C are tigogenin penta-and hexaosides. Glycoside B, which we have called yuccaloeside B is (25R)-5α-spirostan-3β-ol 3-{[O-β-D-glucopyranosyl-(1→2)]-[O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→3)]-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside}, and glycoside C, which we have called yuccaloeside C is (25R)-5α-spirostan-3β-ol 3-{[(O-β-D-glucopyranosyl-(1→3)-O-β-D-glucopyranosyl-(1→2)]-[O-α-L-rhamnopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→3)]-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside}.     

Composition of the phospholipids of the seeds of Spaium sebiferum

The fractional composition of the polar lipids and also the fatty-acid composition of the main components of the phospholipids of the Chinese tallow tree have been studied. It has been established that in the seeds of the Chinese tallow tree there are 11 phospholipids, two glycolipids, and two phosphonolipids. The main fatty acids of the phospholipids are palmitic and linoleic.I. G. Kutateladze Institute of Pharmatochemistry, Georgian Academy of Sciences, Tbilisi. Institute of Chemistry of Plant Substances, Uzbek Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 619–621, September–October, 1991.     

Lipids of the seeds ofPaliurus spina-christi

The composition of the unsaturated and oxidized fatty acids and steroids of the lipids of the seeds ofPaliurus spina-christi has been determined. Among the unsaturated acids the 20:1 (11) was detected, while the 18:1 and 18:2 acids predominate. The oxidized acids are represented by the sum of the 9,10(12,13)-epoxy-12(9)-18:1, the 9,10-epoxy-18:0, the oxo-18:1, the oxo-18:2, the 12-hydroxy-9-18:1, and the 9-hydroxy-10,11-18:2 acids. The main component of the sterols is -sitosterol. It has been found that the composition of the acylglycerols of the lipids of the seeds ofP. spina-christi gathered in different years is variable.I. G. Kutateladze Institute of Pharmatochemistry, Academy of Sciences of the Georgian SSR, Tbilisi. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 322–326, May–June, 1985.     

A triterpene oligoside,hederacolchiside E,fromHedera colchica

Chemistry of Natural Compounds -     

Triterpene glycosides ofAstragalus and their genins. XVI. Cyclogaleginosides A and B fromAstraglus galegiformis

The reductive amination of d-fenchone by aliphatic nitriles has been studied. A probable reaction pathway is suggested, and the stereochemical composition of the products has been determined. It has been established with the aid of¹³C NMR that the reaction forms a mixture of isomeric optically active N-alkyl-1,3,3-trimethylbicyclo[2.2.1]hept-2-ylamines with a 3:1 ratio of endo and exo isomers. The absolute configurations of the amines synthesized have been determined.Institute of Physical Organic Chemistry, Academy of Sciences of the Belorussian SSR. Minsk. Institute of Chemical and Biological Physics, Academy of Sciences of the Estonian SSR, Tallin. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 480–483, July–August, 1983.