Flavonoids and ent-labdane diterpenoids from Andrographis paniculata and their antiplatelet aggregatory and vasorelaxing effects.
Two new flavones, designated as andropaniculosin A (1) and andropaniculoside A (2), and 30 known compounds were isolated as a result of detailed chemical examination on the whole plants of Andrographis paniculata. Their structures have been elucidated mainly by 1D and 2D NMR, and MS spectroscopic methods. Among them, four flavonoids showed potent inhibition of collagen, arachidonic acid, thrombin, and platelet activation factor induced platelet aggregation. Furthermore, a diterpenoid demonstrated moderate vasorelaxing effect in isolated rat thoracic aorta.
Department of Chemistry, National Cheng Kung University, Tainan, Taiwan. tswu@mail.ncku.edu.tw
Tian-Shung
TS
Wu
Huei-Jen
HJ
Chern
Amooru Gangaiah
AG
Damu
Ping-Chung
PC
Kuo
Chung-Ren
CR
Su
E-Jian
EJ
Lee
Chi-Ming
CM
Teng
D035685:Andrographis / Q000737:chemistry*; D000818:Animals; D001011:Aorta / Q000187:drug effects; D004224:Diterpenes / Q000737:chemistry / Q000494:pharmacology*; D005419:Flavonoids / Q000737:chemistry / Q000494:pharmacology*; D015394:Molecular Structure; D010975:Platelet Aggregation Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D051381:Rats; D014664:Vasodilation / Q000187:drug effects*
D004224:Diterpenes; D005419:Flavonoids; D010975:Platelet Aggregation Inhibitors