[Studies of the chemical constituents of Swertia davida Franch].
OBJECTIVE
To study the active constituents of Swertia davidi Franch..


METHODS
Chromatography was used to isolate and purify the chemical components, their structures were identified by spectral analysis.


RESULTS
Three compounds were identified as 1,7-dihydroxy-3,8-dimethoxyxanthone (gentiacaulein) (V), 1,8-dihydroxy-3,7-dimethoxyxanthone (methylswertianin) (VI) and 1,8-dihydroxy-3,4,7-trimethoxyxanthone (VII).


CONCLUSIONS
Compound VII is a novel xanthone, named daviditin A, the others were isolated from Swertia davidi Franch. for the first time.
Tan
Gui-shan
GS
Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, China.
Xu
Kang-ping
KP
Xu
Ping-sheng
PS
Hu
Gao-yun
GY
Li
Yuan-jian
YJ
D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D029967:Swertia / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
C482744:1,8-dihydroxy-3,4,7-trimethoxyxanthone; D044004:Xanthones; C009689:xanthone