目的 研究木奶果Baccaurea ramiflora根的化学成分。方法 采用各种色谱技术进行分离纯化，通过理化常数和UV、IR、ESI-MS、¹H-NMR、¹³C-NMR、Dept90、Dept135、¹H-¹HCOSY、¹H-¹HNOESY、HMQC、HMBC光谱分析鉴定化合物结构。结果 分离和鉴定出一种新化合物。结论 该化合物为新化合物，命名为表二氢羟基马桑毒素。

Objective To study the chemical constituents in the root of Baccaurea ramiflora．Methods Various chromatographic techniques were used to separate and purify the constituents．The structures of the compounds were elucidated by physicochemical properties and spectral analyses(UV，IR，ESI—MS,¹H—NMR，¹³C—NMR，Dept90，Deptl35，¹H-¹H COSY，¹H一¹H NOESY，HMQC，HMBC)．Results A new compound was isolated and idertified．Conclusion This compound is a novel compound and named as epidihydrotutin．