the supports of the National Natural Science Foundation of China(No.30873115);National Science and Technology Special Projects(Nos.2009zx09301-003-5-1 and 2009zx09301-003-7-1);supported by the analytical center of the Peking branch of Japanese Shimadzu Corporation to provide the LCMS~n-IT-TOF system
Metabolism study has been carried out on 1-hydroxy-2,3,5-trimethoxyxanthone (HM-1) and 1-hydroxy-2,3,4,7- tetramethoxyxanthone (HM-2), which are two biologically active ingredients isolated from the Tibetan herb, ...