Glaucanisin, A New Acetogenin fromAnnona glauca

Abstract
Glaucanisin (1), a new adjacent bis-tetrahydrofuran acetogenin, was isolated together with a known compound, rolliniastatin-2 (2) from the CH2Cl2 extract of Annona glauca seeds. NMR and mass spectroscopic methods were used for the structure elucidation of glaucanisin, through comparison with the spectral data of rolliniastatin-2 (= bullatacin).