title: Four new fluorenone alkaloids and one new dihydroazafluoranthene alkaloid from Caulophyllum robustum Maxim.
abstract: Four new fluorenone alkaloids, caulophylline A-D (1-4), and one new dihydroazafluoranthene alkaloid, caulophylline E (5) were isolated from the roots of Caulophyllum robustum Maxim. Their structures were elucidated by spectroscopic analysis. Among the isolated alkaloids, Caulophylline E showed good scavenging effects against DPPH radical with IC(50) of 39 μM.
authors: Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, Baoji 721013, China. xlwangwang@163.com
authors: Xiao-Ling
authors: XL
authors: Wang
authors: Bing-Rui
authors: BR
authors: Liu
authors: Chien-Kuang
authors: CK
authors: Chen
authors: Jun-Ru
authors: JR
authors: Wang
authors: Shoei-Sheng
authors: SS
authors: Lee