New carbazole alkaloids from Clausena anisata with antitumor promoting activity - Ito,C.; Katsuno,S.; Itoigawa,M.; Ruangrungsi,N.; Mukainaka,T.; Okuda,M.; Kitakawa,Y.; Tokuda,H.; Nishino,H.; Furukawa,H. (Journal of Natural Products, 2000)