Title of article :
Xanthones and Xanthone Derivatives from Garcinia nitida
Author/Authors :
Ee, G. C. L. Universiti Putra Malaysia - Faculty of Science - Department of Chemistry, Malaysia , Lim, C. K. Universiti Putra Malaysia - Faculty of Science - Department of Chemistry, Malaysia , Taufiq-Yap, Y. H. Universiti Putra Malaysia - Faculty of Science - Department of Chemistry, Malaysia , Sukari, M. A. Universiti Putra Malaysia - Faculty of Science - Department of Chemistry, Malaysia , Rahmani, M. Universiti Putra Malaysia - Faculty of Science - Department of Chemistry, Malaysia
Abstract :
A detailed chemical study on the stem bark extracts of Garcinia nitida has led to the isolation of five xanthones and two triterpenoids. They are I ,3,7-trihydroxy-2,4-bis(3methylbut- 2-enyl)xanthone (1) osajaxanthone, (2) ino phyllin B, (3) 3-isomangostin, (4) rubraxanthone, (5) stigmasterol and stigmasterol acetate . The structures of these com po un ds were established using mainly ID and 2D NMR spectroscopy. Acetylation of rubraxanthone resulted in two new compounds, rubraxanthone monoacetate (6) and rubraxanthone diacetate (7) , along with rubraxanthone triacetate (8) .
Keywords :
Garcinia ni tida , gu ttifera e , xanthones , tri terpenoids
Journal title :
Pertanika Journal of Science and Technology ( JST)
Journal title :
Pertanika Journal of Science and Technology ( JST)
