Chemical constituents from the leaves of uvaria boniana in viet nam

A phytochemical study of Uvaria boniana Fin. & Gagnep collected at Pumat National Park, Nghe An province led to the isolation of five secondary metabolites, including uvaridacol G (1); 4-methyl-4-[(2Z)-3'-phenylprop-2'-en-1'-yl]cyclohex-2-en-1-one (2); 3,7dimethoxy quercetin 4'-O-[α-L-rhamnopyranosyl-(12)-β-D-glucopyranoside (3); -sitosterol (4) and stigmasterol (5). Their structures were determined on the basis of one and two-dimensional NMR and spectrometric methods. This is the first report on the chemical constituents of Uvaria boniana in Viet Nam.