Annosenegalin and annogalene: two cytotoxic mono-tetrahydrofuran acetogenins from Annona senegalensis and Annona cherimolia.

Two new cytotoxic mono-tetrahydrofuran acetongenins, annosenegalin and annogalene, have been isolated from the cytotoxic methanolic extract of Annona senegalensis and A. cherimolia seeds. Their structures were established on the basis of 1D and 2D NMR spectroscopic techniques. Annosenegalin belongs to the rare type of C37 mono-tetrahydrofuran acetogenins, and annogalene is an olefinic acetogenin.