目的对白桦叶的化学成分做系统研究,以更好的开发利用我国的植物资源。方法采用硅胶柱、凝胶柱及制备薄层色谱法进行分离,通过波谱技术(¹HNMR,¹³CNMR,¹H-¹HCOSY,HMQC,HMBC,NOESY)进行结构鉴定。结果分离鉴定了4种二苯基庚烷类化合物,槭木素丁(Ⅰ),氧杂二苯庚烯(Ⅱ),17-甲基-15-甲氧基-7-氧代槭木素丁(Ⅲ),槭木素十一(Ⅳ)。结论化合物,均首次从本种植物中分离得到,并纠正了化合物的碳谱数据归属。

Object To study the chemical consti tuents of Betula platyphylla Suk. for the better deve-lopmen t an d utilization of botanic resources of our country. Methods The constituents were isolated by column chromatography (silica gel and Sephadex LH 20) and preparative TLC, and identified by means of spectral data (¹HNMR， ¹³CNMR， ¹H-¹HCOSY， HMQC， HMBC， NOESY). Results 4 diarylheptanoids were obtained and elucidated as acerogenin E (Ⅰ )， (3R)-3, 5'-dihydroxy-4'-methoxy-3', 4″-oxo-l, 7-diphenyl-l-hep te ne (Ⅱ), 15-methoxy-17-O-methyl-7-oxoacerogenin E (Ⅲ), ac erogenin K (Ⅳ). Conclusion Compounds Ⅲ and Ⅳ were isolated for the first time from this plant and the assignment of ¹³CNMR data o f compound Ⅲ was corrected.