Nine new cytotoxic monotetrahydrofuranic annonaceous acetogenins from Annona montana

Nine monotetrahydrofuranic Annonaceous acetogenins, montalicins A - E (1-5), cis-annoreticuin (6), montalicins F (7), I (8), and J (9), along with eight known acetogenins 10-17, were isolated from the seeds of Annona montana by a high performance liquid chromatographic (HPLC) method. The structures of all new isolates were elucidated and characterized by spectroscopic and chemical methods. These monotetrahydrofuranic Annonaceous acetogenins showed selectively potent cytotoxicity against two human cancer cell lines, 1A9 and Hep G2.