摘要
Two new indole alkaloids, 4-oxo-4,12-dihydroindolo[2,3-a]quinolizine-3-carbaldehyde (1) and 1,6,7-trihydro-indolo- [2,3-a]furan[3,4-g]quinolizine-3,4(13H)-dione (2), were isolated from Nauclea officinalis. Their structures were determined on the basis of 1D and 2D NMR spectral data.
Two new indole alkaloids, 4-oxo-4,12-dihydroindolo[2,3-a]quinolizine-3-carbaldehyde (1) and 1,6,7-trihydro-indolo- [2,3-a]furan[3,4-g]quinolizine-3,4(13H)-dione (2), were isolated from Nauclea officinalis. Their structures were determined on the basis of 1D and 2D NMR spectral data.
