Chemical Composition of the Volatile Concentrate from the Flowers of VietnameseAlstonia scholaris(L.) R.Br.,Apocynaceae

Modulatory Effects of Alstonia scholaris on Biochemical and Antioxidant Parameters in Experimentally Induced Hepatotoxicity in Wistar Rats

“…Alstonia scholaris L. (Apocynaceae) distributed throughout tropical and subtropical region of the world is widely used in traditional system of medicine in Asia, America and Africa (Dassanayake, 1982). Leaves of A. scholaris are rich source of flavonoidal glycosides, indole alkaloids, steroids and terpenoids (Desoky, 1999;Dung et al, 2001). The leaf extracts of A. scholaris Ethanolic extract was prepared by using ethyl alcohol in extract container of soxhlet apparatus according to standard method (Harborne, 1998).…”

Volatile Constituents of the Leaf Oil ofAlchornea tiliifolia(Benth.) Muell. (Family Euphorbiaceae) from Vietnam

“…The temperature was programmed as reported above. Component identification was carried out by comparing MS data with those reported in Wiley Library on Chemstation HP, and in some cases substances identified from oils known composition and also with standard substances (5)(6)(7)(8)(9)(10).…”

Alstonia scholaris: It′s Phytochemistry and pharmacology

“…The volatile concentrate contained more than 90% of oxygenated compounds, which contributed to its fragrant odour [15] Column fraction n-hexacosane, lupeol, palmitic acid, β-amyrin and ursolic acid [16] Column fraction Picrinine and strictamine [17] Bark Root bark Two triterpenoids, α-amyrin acetate and lupeol, and a steroid, β-sitosterol [18] Trunk bark A new indole alkaloid, akuammiginone, and a new glycosidic indole alkaloid, echitamidine-N-oxide 19-O-β-d-glucopyranoside, together with the five known alkaloids, echitaminic acid, echitamidine N-oxide, N-demethylalstogustine N-oxide, akuammicine N-oxide, and N-demethylalstogustine [19] Alkaloidal extract Six new monoterpenoid indole alkaloids, scholarisines B-G together with 15 known analogues, were isolated from the bark of A. scholaris [20] Bark Triterpenoids α-amyrin acetate and lupeol [21] Ethanolic extracts Four new 11-noriridoids, namely, scholareins A-D, along with three known derivatives, isoboonein, alyxialactone, and loganin [22] Alcoholic extracts 17-O-acetylechitamine and echitamine [23] Contain scholarisine I and scholarisine II [24] Leaves Leaves extract The eight elements, Cu, Zn, Fe, Mg, Ca, Cr, Mn and Cd, were extracted from the leaves of A. scholaris based on traditional analytical flowchart program and separated into water-soluble state and suspension state by microporous filtering film [25] Column fraction Iridoids, alkaloids, coumarins, flavonoids, leucoanthocyanins, reducing sugars, simple phenolics, steroids, saponins and tannins [26] Methanolic extract A new indole alkaloid, akuammidine-N-oxide together with akuammidine [27] Leaves extract Eight flavonoids were isolated and identified: kaempferol, quercetin, isorhamnetin, kaempferol…”