Structures of β-senepoxide, tingtanoxide, and their diene precursors. Constituents of Uvaria ferruginea

β-Senepoxide 9, Tingtanoxide 10, and their diene precursors 7 and 8 were isolated from Uvaria ferruginea (Annonaceae). Their structures and absolute configurations were deduced using spectroscopy and chemical correlations with compounds of known stereostructures.