14187-51-0Relevant articles and documents
A new antiviral flavone glycoside from vernonia cinerea less
Yadava,Raj, Mamta
, p. 3542 - 3544 (2013/05/08)
A new flavone glycoside (A) m.p. 258-260 °C, m.f. C33H 40O19, [M] 740 (FABMS), has been isolated from roots of Vernonia cinerea Less. It was characterized as 5,7,4'-trihydroxy 3'-methoxy flavone-4'-O-a-L-rhamnopyranosyl-(14)-O-a-L-arabino-pyranosyl-(1 3)-O-b- D-galactopyranoside by various chemical degradations and spectral analysis which showed antiviral activity alongwith two known compounds luteolin (B) and taxifolin (C).
A Flavonol-diglycoside from Melastoma melabathricum
Dinda, B.,Saha, M. K.
, p. 209 - 211 (2007/10/02)
A new flavonol-diglycoside was isolated from the methanolic extract of the aerial parts of Melastoma melabathricum.Its structure was established as quercetin-3-O-α-L-rhamnosyl-(1->2)-β-D-galactoside on the basis of physical and chemical evidences.
A NEW STEROID GLYCOSIDE, TACCAOSIDE, FROM Tacca cheancer
Ngok, Fam Khoang,Kel'ginbaev, A. N.,Gorovits, M. B.,Abubakirov, N. K.
, p. 262 - 264 (2007/10/02)
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>.