Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc.
486.8±45.0 °C at 760 mmHg
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Comparative research between Bai-hua Qian-hu, a Chinese traditional plant, and its active ingredient on nuclear factor-kappa and tumor necrosis factor-alpha in isolated ischemia-reperfusion heart of rat
Chi Wang 1, Tian-hui Chang
The effects of coumarin derivatives, osthole, imperatorin, Pd-Ia, Pd-II and Pd-III, on mice concanavalin A (Con A) (0.2 mg/mouse, i.v.)-induced hepatitis were studied. At the dose of 200 mg/kg (i.p.), these coumarins inhibited more than 90% of the Con A-induced elevation of plasma alanine aminotransferase activity, but glycyrrhizin (200 mg/kg, i.p.) caused only 45% inhibition. At the dose of 100 mg/kg (i.p.), osthole produced the strongest inhibition among these coumarins. The inhibitory activity of osthole is lost when its 7-methoxy group is replaced by a 7-hydroxy group to form osthenol. The present results showed that coumarin derivatives inhibited Con A-induced hepatitis, with osthole being the most inhibitory.
Inhibition of concanavalin A-induced mice hepatitis by coumarin derivatives
T Okamoto 1, S Yoshida, T Kobayashi, S Okabe
Qian-Hu is a well-known traditional Chinese medicine used for the treatment of respiratory diseases and pulmonary hypertension. We compared the relaxant effects of pyranocoumarin compounds, including (+)-praeruptorin A (Pra-C), Pd-Ia (=(+/-)-praeruptorin A), pteryxin, peucedanocoumarin II (P-II) and 8-methoxy-psoralen (8-MOP) purified from Bai-Hua Qian-Hu (BQ) in isolated rabbit tracheas and pulmonary arteries. Pra-C, pteryxin and Pd-Ia produced significant relaxant effects in tracheal preparations constricted with 40 mM KCl or 10 microM acetylcholine. The relaxant response to Pra-C, pteryxin or Pd-Ia in preparations constricted with KCl was significantly more potent than that in preparations constricted with acetylcholine. Pra-C, pteryxin or Pd-Ia at a concentration of 30 microM completely relaxed tracheas constricted with 40 mM KCl, whereas P-II at the same concentration showed only partial relaxation. In pulmonary arterial preparations, 8-MOP produced a significant relaxant effect on contractions by 10 microM phenylephrine, without any effect on the contraction by 40 mM KCl. These results suggest that Pd-Ia, pteryxin and Pra-C for their calcium antagonistic action, and 8-MOP for its inhibitory effect on contraction induced by phenylephrine, may be the active principles of BQ for relaxing the smooth muscle of tracheas and pulmonary arteries, and the principle may produce a synergistic effect.
Relaxant effects of pyranocoumarin compounds isolated from a Chinese medical plant, Bai-Hua Qian-Hu, on isolated rabbit tracheas and pulmonary arteries
N C Zhao 1, W B Jin, X H Zhang, F L Guan, Y B Sun, H Adachi, T Okuyama