A series of ~1 H NME decoupling experiments then led to the carbon skeleton of koumine.2的相对构型系通过~1HNMR分析而判断....

koumine的音标：koumine的英式发音音标为：['ku:mɪn]koumine的美式发音音标为：['kumɪn]...

钩吻碱子...