Abstract A new bis-norclerodane-type and two new clerodane-type diterpenoids were isolated from the Japanese liverwort, Jungermannia infusca, together with twelve known clerodane-, labdane- and ent-kaurane-type diterpenoids. These structures were determined by the use of NMR spectroscopic techniques, chemical degradation and X-ray crystallographic analyses. The presence of (+)- and (−)-isoabienol were
摘要 从日本地草(Jungermannia infusca)中分离出一种新的双正甲油丹型和两种新的克罗丹型二萜,以及十二种已知的克罗丹、拉丹丹和对映贝壳杉烷型二萜。这些结构是通过使用 NMR 光谱技术、
化学降解和 X 射线晶体学分析确定的。(+)-和(-)-异二萜醇的存在通过手性HPLC分析证实。