Chemistry of two new Leprarioid lichens from Sri Lanka
Journal of The National Science Foundation of Sri Lanka(2010)
摘要
The hexane and dichloromethane extracts of the lichen Leproloma sipmantanum, collected from Beragala, contained the compounds, atranorin 1, /Lsitosterol 2, (+)-usnic acid 3, zeorin 4 and tritetracontylpentanoate 5 while the methanol extract furnished the t riterpenoid 3P-acetoxyfern-9(11)-ene 6. In addition to compounds 1-5, the lichen powder yielded glyceryl trilinolate 7 and 3, 6-dimethyl-2-hydroxy-4-methoxybenzoic acid 8. Chromatography of the lichen powder of Lepraria atrotomentosa led to the isolation of five compounds, including compounds 1-4 along with methyl-~orcinolcarboxylate 9. (+)-Usnic acid exhibited potent antitermite activity against a common pest of tea at low elevations, Glyptotermes dikztatus. 3,6-Dimethyl-2-hydroxy-4-methoxybenzoic acid 8 showed moderate larvicidal activity against the second instar larvae of Aedesaegypti.
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关键词
3,tritetracontylpentanoate,leproloma sipmanianum,leprariaatrotomentosa,mosquito larvicidal assay,methyl-p-orcinolcarboxylate,+-usnic acid,glyceryl trilinolate,6-dimethyl-zhydroxy- 4-methoxybenzoic acid,atranorin,anti termite assay,lichen
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