“…2 Previous studies on U. cherrevensis, Annonaceae family, found various types of secondary metabolites, including alkaloids, cyclohexenes, flavonoids, naphthalene derivatives, and terpenoids. [3][4][5][6][7][8] We report here the first isolation of cyclohexene (9Z)-octadec-9-enyl ethers, cherrevenols M-O (1)(2)(3), from the leaf extracts of U. cherrevensis. The application of 13 C NMR and Ozone Induced Dissociation (OzID) mass spectrometry were used to determine the (Z) configuration and C-9 position of the olefinic moiety of the C-18 ether side chains, respectively.…”