CADINANOLIDES AND OTHER CONSTITUENTS FROM VERNONIA FRUTICULOSA AND VERNONANTHURA DISCOLOR

摘要

Aerial parts of Vernonia fruticulosa furnished a large amount of glaucolide B, two known and one new cadinanolide as well as three known flavonoids. The silica gel catalysed rearrangement of glaucolide B to one of the cadinanolides supports the proposal that cadinanolides isolated from Vernoniinae may be artefacts derived from glaucolide type precursors. Aerial parts of Vernonanthura discolor afforded friedelanol, friedelin and beta-sitosterol.