来源 :Chinese Chemical Letters | 被引量 : [!--cite_num--]次 | 上传用户:[!--user--]
【摘 要】
:
Two novel xanthones, 1,6-dihydroxy-4,5-dimethoxyxanthone (1) and 1,5,6-trihydroxy-7,8-di(3-methyl-2-butenyl)-60,60- dimethylpyrano(20,30:3,4)xanthone (2) were i
To the south of the city lies Beijing Opera school, which has a history of nearly half a century. Dozens of children are in the Peking Opera department. The yo