Mulinic and isomulinic acids. Rearranged diterpenes with a new carbon skeleton from mulinum crassifolium
作者:Luis A. Loyola、Glauco Morales、Benjamin Rodriguez、Jesús Jiménez-Barbero、Maria C.de la Torre、Aurea Perales、Maria R. Torres
DOI:10.1016/s0040-4020(01)87848-0
日期:1990.1
Two new diterpenoids, mulinic and isomulinic acids, have been isolated from the aerial parts of Mulinum crassifolium (Umbelliferae). The structure of mulinic actd (1) was determined by a combination of spectroscopic and single-crystal X-ray diffraction analyses.The proposed structure of isomulinic acid (2) was based on spectroscopic comparison with mulinic acid and on chemical grounds. The diterpenoids
从穆桑(Mulumum crassifolium)(伞形科)的地上部分中分离出了两种新的二萜类化合物:木酸和异麦酸。通过光谱学分析和单晶X射线衍射分析相结合,确定了木林酸(1)的结构。提出的异麦草酸(2)的结构是基于与木林酸的光谱比较和基于化学基础的。二萜1和2具有新颖的碳骨架,简要讨论了来自合适的拉丹烷衍生物的合理的生物遗传途径。