New anti-emetic flavanone glycoside from cotoneaster affinisAuthor(s): J.S.Jangwan, M.P.Tiwari
The present paper deals with the isolation Characterization of a new compound along with Genkwanin and Kaempferol fromthe sapwood and antiematic activity determination of 1. Fromthemethanolic extract, genkwanin, kampferol, naringenin and a newderivatives 1 were isolated. The structure of the known compounds were determined by spectroscopic methods and by direct comparision  (m.m.p., co-TLC, Superimposible IR) with authentic samples. The new compound 1 was purified by acetylated and characterized with the help of NMR and MS datas.