THE RESULTS OF STUDYING ON CHEMICAL CONSTITUTION OF BYTTNERIA ASPERACOLEBR

Abstract

Byttneria asperaColebr Vietnamese is known under the name Trom leoand belongs to the Sterculiaceae family. In our International Cooperative Biodiversity Groups ( ICBG) program, on the research of biodiversity of Vietnam and Laos, we collected plant samples at Cuc Phuong National Park and previously reported the isolation of six compounds from the roots of Byttneria aspera. In continuation on phytochemical study of this plant, 7 compounds 3β-hydroxytaraxer-14-ene-1-one (7), epigallocatechin (8), polystachyol (9), threo and erythroanethole glycol  (10),syringic acid  (11)and 2-hydroxy-4'-methoxypropiophenone (12)were isolated and characterized. Their structures were determined by spectroscopic methods including MS, 1D and 2D NMR