No abstract

The crude methanol extracts of the root barks of Turraea wakefieldii and Turraea floribunda were found to show mosquito larvicidal activity against third-instar larvae of Anopheles gambiae sensu stricto. Four new limonoids comprising a vilasininoid 1 and three havanensinoids 2-4 were isolated from the chloroform fractions of the methanol extracts of T. wakefieldii and T. floribunda, respectively. The structures of the compounds were elucidated by NMR spectroscopy. Compounds 1, 2, and 4 had LD50 values of 7.1, 4.0, and 3.6 ppm, respectively, and were more potent than azadirachtin, which had an LD50 value of 57.1 ppm when tested against larvae of A. gambiae.

No abstract

+)-12, 12, acetate has been isolated from the seed kernels of Turraeanthus africanus (Nelw. ex DC). The stereo structure was confirmed by 1D-and 2D-NMR spectroscopy. Cytostatic/cytotoxic test of (I) on the growth of cancer cells in vitro gave positive results.

No abstract