Disclosed herein are novel compounds of formula (I):wherein each of the substituents is given the definition as set forth in the Specification and Claims.Also disclosed are the uses of these compounds, an acetone-extracted product of gamboge resin and fractions obtained from the acetone-extracted product in the manufacture of pharmaceutical compositions.本發明揭示具有下列化學式(I)的新穎化合物:其中各個取代基的定義是如說明書與申請專利範圍中所界定者。本發明亦揭示此等化合物、藤黃樹脂的一丙酮萃取產物以及得自於該丙酮萃取產物的分離部分在製備藥學組成物上的用途。