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Monoterpenes and sesquiterpenes from Clausena excavata
PENG Wen-wen1,2,3, SONG Wei-wu2, HUANG Mao-bo2, TAN Ning-hua2*
(1.Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China;
2. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of
Botany, Chinese Academy of Sciences, Kunming 650201, China;
3.College of Agriculture, Jiangxi Agricultural University, Nanchang 330045, China)
[Abstract] To investigate monoterpenes and sesquiterpenes of the stems and leaves of Clausena excavata, an AcOEt fraction of the methanol extract was subjected on column chromatographies including silica gel and RP-18, as well as preparative HPLC. The structures of compounds isolated were identified on the basis of spectroscopic data as excamonoterpene(1),(6R, 9S)-9, 10-dihydroxy-4-megastigmen-3-one(2),(3R, 6R, 7E)-3-hydroxy-4, 7-megastigmadien-9-one(3),(3S)-3-hydroxy-7, 8-dihydro-β-ionone(4),(3S,5R,6S)-3-hydroxy-5,6-epoxy-β-ionone(5), (6R,9R)-9-hydroxy-4-megastigmen-3-one(6),(3S, 5R)-dihydroxy-6, 7-megstigmadien-9-one(7),(-)-loliolide(8), caryolane-1,9α-diol(9) and 2, 6-dihydroxyhumula-3(12), 7(13), 9(E)-triene(10), were isolated from the stems and leaves of C. excavata. Compound 1 is a new monoterpene, named as excamonoterpene. Compounds 2-10 were isolated from this plant for the first time.
[Key words] Rutaceae; Clausena excavata; monoterpenes; sesquiterpenes
doi:10.4268/cjcmm20140915