Survey of Alkaloids from Lagerstroemia

บทคัดย่อ

The results of preliminary test for alkaloids, flavanoids, steroids and triterpenoids of four species of the genus Lagerstroemia (Lythraceae) showed that there were only trace amount of alkaloids in the leaves of L. speciosa Pers., L. macrocarpa Wall., L. loudonii Teijsm. & Binn., L. duperreana Pierre and in the baeks of L. duperreana. There was no fiavanoid in the leaves and the barks of L. duperreana. The leaves of L. speciosa contained only trace amount of flavanoids but in the leaves of L. macrocarpa and L. loudonii, flavanoids were concentrated. There were steroids in the leaves and the barks of all plants which were tested. The isolation and structure elucidation of the compounds of L. Lagerstroemia tested is under way.