Abstract:In order to study the chemical compositions in Myoporum bontioides, eleven compounds were isolated from leaves by chromatographic separation methods. On the basis of spectral data, they were identified as 5, 7, 3?-trishydroxy-4?-methoxyflavone (1), 3, 5, 7, 4?-tetrahydroxy-3?-methoxyflavone (2), 5, 7, 4?-trihydroxy-3?, 5?-dimethoxyflavone (3), 3', 4', 5, 7-tetrahydroxyflavanone (4), kaempferol (5), rhamnetin (6), 5, 7-dihydroxyfla-vanone (7), 7, 4'-dihydroxyflavanone (8), 5, 7, 3?, 4?-trihydroxyflavanone (9) 5-acetyloxy-3, 7, 3?, 4?-tetrahydroxy- flavanone (10) and 7-methoxyaromadenrin (11). All compounds were obtained from M. bontioides for the first time except compounds4,7 and11. The compounds4,7-9 and11 had strong antifungal activity against Peronophythora litchi.