Abstract: | 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)-5 -spirostan-3 -ol 3-{O- -D-glucopyranosyl-(1 2)]-O- -L-rhamnopyranosyl-(1 4)-O- -D-glucopyranosyl-(1 3)]-O- -D-glucopyranosyl-(1 4)- -D-galactopyranoside}, and glycoside C, which we have called yuccaloeside C is (25R)-5 -spirostan-3 -ol 3-{(O- -D-glucopyranosyl-(1 3)-O- -D-glucopyranosyl-(1 2)]-O- -L-rhamnopyranosyl-(1 4)-O- -D-glucopyranosyl-(1 3)]-O- -D-glucopyranosyl-(1 4)- -D-galactopyranoside}.N. G. Kutateladze Institute of Pharmacochemistry of the Georgian SSR Academy of Sciences, Tbilisi. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 537–542, July–August, 1987. |