Chemistry of Natural Compounds p. 262 - 264 (1980)
Update date:2022-08-02
Topics:
Ngok, Fam Khoang
Kel'ginbaev, A. N.
Gorovits, M. B.
Abubakirov, N. K.
A new steroid glycoside of the spirostan series - taccaoside (I) - has been isolated from an ethanolic extract of the roots of Tacca cheancer (family Taccaceae).An acid hydrolysate was found to contain the aglycone diosgenin (II) and the sugars D-glucose and L-rhamnose in a ratio of 1:2.By methyletion and hydrolysis of the permethylete (IV) it has been established that the two terminal L-rhamnose residues are attached at C-2 and C-3 of the D-glucose molecule which, in its turn, substitutes the hydroxy group at C-3 of diosgenin.Glycoside (I) has the structure of (25R)-spirost-5-en-3β-ol 3-O-<
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