3WuZY.新华本草纲目[M]Vol 3[M].Shanghai: Shanghai Scientific and Technical Publis,1988..
4Ahmed M. Microbial transformation of pyrethrosin [J]. J Nat Prod, 2001, 64: 1098-1099.
5CongPZ SuKM.分析化学手册第九分册[M].Beijing: Chemical Industry Press,2000..
6Jaensch M, Jakupovic J, King R M, et al. Pyrones and other constituents from Podolepis species [J]. Phytochemistry,1989, 28(12) : 3497-3501.
7Nakamura K, Takemura Y, Ju ichi M, et al. Three new coumarins from Clausena excavata[J]. Heterocycles, 1998,48(3): 549-553.
8Sholichin M, Yamasaki K, Kasai R. 13C Nuclear magnetic resonance of lupane-type triterpenes, lupeol, betulin and betulic acid [J]. Chem Pharm Bull, 1980, 28:1006-1008.
9Robinson F P, Martel H. Betulinic acid from Arbutus menziesii [J]. Phytochemistry, 1970, 9: 907.
