24462-98-4Relevant academic research and scientific papers
A NEW STEROID GLYCOSIDE, TACCAOSIDE, FROM Tacca cheancer
Ngok, Fam Khoang,Kel'ginbaev, A. N.,Gorovits, M. B.,Abubakirov, N. K.
, p. 262 - 264 (1980)
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-2)>3)>-β-D-glucopyranoside>.
DUNAWITHANINES A AND B, THE FIRST WITHANOLIDE GLYCOSIDES FROM DUNALIA AUSTRALIS
Adam, Guenter,Chien, Nguen Quyet,Khoi, Nguen Huu
, p. 2293 - 2298 (2007/10/02)
Withanolide D, 7β-acetoxy-withanolide D and two new withanolide glycosides, named dunawithanines A and B, were isolated from Dunalia australis.From physical data and chemical transformations, the structures of the new compounds were determined as (20R,22R)-O(3)--3β,20-dihydroxy-1α-acetoxy-witha-5,24-dienolide and the corresponding O(3)-x)-β-D-glucopyranosyl> compound, representing the first withanolide glycosides found in the plant kingdom. - Key Word Index: Dunalia australis; Solanaceae; withanolide glycosides; steroidal lactones; dunawithanines A and B.
