Flavonoids from Herissantia tiubae .
AbstractABSTRACT Four known flavones, 5-hydroxyauranetin, araneosol, calycopterin and sarothrin, were isolated from the aerial parts of Herissantia tiubae . (K. Schum) Brizicky (Malvaceae). Their structures were identified by the use of spectroscopic methods such as IR, UV, and mainly nuclear magnetic resonance, which included two-dimensional techniques ( 1 H- 1 H COSY, NOESY, HETCOR, and HMBC). This is the first reported isolation of these compounds from the genus Herissantia ..