Abstract: Abstract Three compounds were isolated from fresh leaves of Leucosceptrum canum Smith. Their chmical structures were determined by spectra data and che-mical reactions as isosclareor I, pectolinarigenin II, and β-sitosterol III, respecti-vely. Among them I is a new natural terpinoid possessing labdane type.

Key words: Leucosceptrum canum

摘要： 从米团花(Leucosceptrum canum Smith)鲜叶中分到三个化学成分，经光谱测定和化学反应已确定它们的化学结构分别为异香紫苏醇(isosclaveol)I;柳穿鱼黄素(Pectolina－rigenin) II;β-谷甾醇(β-sitosterol)Ⅲ.其中化合物I为新的天然存在的labdane类型二萜化合物。

关键词: 米团花, 二萜, 黄酮