Abstract:
Four pure compounds were isolated from the leaves of Alstonia macrophylla Wall. ex G. Don. Three of them were indole alkaloids identified as two vincorine groups namely demethoxyalstonamide and (-)-1-norvincorine and another one of indole alkaloids as macroline group, being alstophylline. The last one was amide namely 3,4,5-trimethoxybenzamide. The structures of all isolated compounds were determined by extensive spectroscopic studies, including comparison of UV, IR, MS and NMR spectra with the previously reported data.
