Separation and identification of a new saponin from the flowers of Guaiacum officinale L.
A triterpenoid saponin, guaianin O (1), oleanolic acid 3-O-{α-L-rhamnopyranosyl-(1 → 2)-[β-D-glucopyranosyl-(1 → 3)]-α-L-arabinopyranoside}-28- O-[β-D-glucopyranosyl]-ester, was isolated from the n-butanol extract of flowers of Guaiacum officinale L. The structural elucidation of 1 was accomplished by extensive studies of both one and two dimensional ¹H, ¹³C-NMR spectra, the FAB mass spectrum, and alkaline and acid hydrolyses.
Department of Chemistry, Jinnah University for Women, Nazimabad Karachi, Pakistan.
Nikhat
N
Saba
Viqar Uddin
VU
Ahmad
Zulfiqar
Z
Ali
Khalid Mohammed
KM
Khan
D035264:Flowers / Q000737:chemistry*; D032441:Guaiacum / Q000737:chemistry*; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*
D010936:Plant Extracts; D012503:Saponins; D009828:Oleanolic Acid