Four new sesquiterpenes, lamellodysidines A and B, O,O-dimethyllingshuiolide A, and 11-epi-O,O-dimethyllingshuiolide A (1–4), were obtained from the marine sponge, Lamellodysidea herbacea, collected in Indonesia. Their planar structures were elucidated by analysis of spectroscopic data. The absolute configurations of the new compounds were determined by the calculated ECD spectra. Compound 1 has a unique carbon framework, and 2 is a new nitrogenous sesquiterpene.

中文翻译：

---

Lamellodysidines A和B，从海洋海绵中分离出的倍半萜类Lamellodysidea herbacea

四个新的倍半萜烯，lamellodysidines A和B，ö，ö -dimethyllingshuiolide A，和11-外延- ö，Ö -dimethyllingshuiolide A（1 - 4），是从海洋海绵，得到Lamellodysidea herbacea，在印度尼西亚收集。通过分析光谱数据阐明了它们的平面结构。新化合物的绝对构型由计算出的ECD光谱确定。化合物1具有独特的碳骨架，而化合物2是新的含氮倍半萜烯。