Phytochemical investigation on the leaves ofNeolamarckia cadamba led to the isolation of four new indole al- kaloids, spirocadambine （1）, dehydraisodihydrocadambine （2）, nitrocadambines A and B （3 and 4）. The st...Phytochemical investigation on the leaves ofNeolamarckia cadamba led to the isolation of four new indole al- kaloids, spirocadambine （1）, dehydraisodihydrocadambine （2）, nitrocadambines A and B （3 and 4）. The structures and relative configurations were established by 1D and 2D NMR spectra. Spirocadambine （1） represents a new type of screw ring containing indole glucoalkaloids.展开更多
文摘Phytochemical investigation on the leaves ofNeolamarckia cadamba led to the isolation of four new indole al- kaloids, spirocadambine （1）, dehydraisodihydrocadambine （2）, nitrocadambines A and B （3 and 4）. The structures and relative configurations were established by 1D and 2D NMR spectra. Spirocadambine （1） represents a new type of screw ring containing indole glucoalkaloids.
