Abstract:
In this study, 12 compounds were isolated from the methanol extract of
Wikstroemia chamedaphne Meisn. using a variety of separation techniques. Based on the NMR, MS and the data in literatures, they were identified as 1-hexanoic acid-2,3-stearic acid triglyceride (
1 ),
β-sitosterol (
2 ), dodecanol (
3 ),
cis-octadeca-9-enoic acid(
4 ), (2
E)-heptyl-3-(3,4-dihydroxyphenyl) acrylate (
5 ), (–)-pluviatolide (
6 ), 1
β-hydroxy-10
β-
H-guaia-4,11-dien-3-one (
7 ), isochamaejasmin (
8 ), neochamaejasmin B (
9 ), stelleranol (
10 ), glyceryl monopalmitate (
11 ) and (+)-nortrachelogenin (
12 ). Among them, compounds
3 ,
4 and
6-12 were isolated from this plant for the first time. The results of antifungal activity evaluation indicated that isochamaejasmin (
8 ) and neochamaejasmin B (
9 ) showed significant inhibitory effects on the mycelial growth and the spore germination of
Phytophthora infestans. The EC
50 values of
8 and
9 were 68.4 μg/mL and 44.9 μg/mL for the growth of
P. infestans, respectively. And the EC
50 values of
8 and
9 were 25.1 μg/mL and 14.0 μg/mL, respectively, for the spore germination of
P. infestans.