Carboline alkaloids from Trigonostemon lii.
Three types with six new carboline alkaloids, trigonostemonines A-F (1- 6), were isolated from the roots and stems of Trigonostemon lii. Their structures were elucidated by spectroscopic analyses. It is the first time that beta-carboline alkaloids have been reported in Trigonostemon species. Trigonostemonine F (6) exhibited moderate cytotoxic activity against HL-60 with an IC (50) value of 16 microM.
Hu
Xu-Jia
XJ
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, P. R. China.
Di
Ying-Tong
YT
Wang
Yue-Hu
YH
Kong
Ling-Yi
LY
Gao
Suo
S
Li
Chun-Shun
CS
Liu
Hai-Yang
HY
He
Hong-Ping
HP
Ding
Jian
J
Xie
Hua
H
Hao
Xiao-Jiang
XJ