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Jung Sup Choi
Eco-friendly and New Materials Research Center, Korea Research Institute of Chemical Technology, Daejeon, South Korea
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Herbicidal Quassinoids Isolated from Ailanthus altissima Leaves
Author(s): Young Sook Kim, Surk-Sik Moon* and Jung Sup Choi*
Bioassay-guided fractionation of the methanolic extract of Ailanthus altissima leaves led to the isolation of one new quassinoid, named 6-α-tigloyloxyailanthone (3), and three known quassinoids, ailanthone (1), 13, 18-dehydroglaucarubinone (2), and 6-α-tigloyloxychaparrinone (4) by a series of chromatographic methods. The structures of the isolates were established by one-dimensional (1D) and 2D-Nuclear Magnetic Resonance (NMR) analysis along with High- Resolution Time-Of-Flight Mass Spectrometry (HRTOFMS) and chemical methods. In addition, herbicidal activity against five grassy weeds and five broad-leaf weeds was evaluated... View more»