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Annona muricata L. - Annonaceae - soursop, Stachelannone, Sauersack

Evergreen tree, up to 4(-10)m high, probable native to the West Indies, widely naturalized and cultivated in tropics.
„The fruit, soursop, is the largest among Annona species. It is eaten raw, used in sherbets, and used in drinks. The pulp is also consumed with wine or cognac.“ http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200008507

„The volatile compounds in soursop (Annona muricata L.) were obtained by a liquid-liquid continuous extraction procedure from the aqueous solution of blended soursop pulp and analyzed by gas chromatography (GC) and GC-mass spectrometry (MS). Twelve volatiles were identified by comparing their mass spectra and Kovats retention indexes with those of standard compounds: five were identified tentatively from MS data only, eight are being reported for the first time. (Z)-3-hexen-1-ol was the main volatile present in mature-green fruit, while methyl (E)-2-hexenoate, methyl (E)-2-butenoate, methyl butanoate, and methyl hexanoate were the four main volatiles present in ripe fruit. Concentrations of these five volatiles decreased and several other unidentified volatiles appeared when the fruit became overripe.“
[Identifying volatiles in soursop and comparing their changing profiles during ripening., Iwaoka, Wayne T., et al., HortScience Vol.28(8), 1993, 817-819]