Chemistry of two new Leprariold lichens from Sri Lanka
Autor(es): Kathirgamanathar, Selvaluxrny; Wickramasinghe, Anura; Bombuwela, Karunananda; Wolseley, Pat; Karunaratne, Veranja
Resumo: The hexane and dichloromethane extracts of the lichen Leproloma sipmanianum, collected from Beragala, contained the compounds, atranorin 1, beta-sitosterol 2, (+)-usnic acid 3, zeorin 4 and tritetracontylpentanoate 5 while the methanol extract furnished the triterpenoid 3 beta-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-beta-orcinolcarboxylate 9. (+)-Usnic acid exhibited potent antitermite activity against a common pest of tea at low elevations, Glyptotermes dilatatus. 3, 6-Dimethyl-2-hydroxy-4-methoxybenzoic acid 8 showed moderate larvicidal activity against the second instar larvae of Aedes aegypti.
Palavras-Chave: Anti termite assay; Atranorin; 3,6-dimethyl-2-hydroxy- 4-methoxybenzoic acid; Glyceryl trilinolate; Lepraria atrotomentosa; Leproloma sipmanianum; Lichen; Methyl-0-orcinolcarboxylate; Mosquito larvicidal assay, Tritetracontylpentanoate; (+)-usnic acid, Zeorin
Imprenta: Journal of the National Science Foundation of Sri Lanka, v. 34, n. 2, p. 85-90, 2006
Identificador do objeto digital: 10.4038/jnsfsr.v34i2.2086
Descritores: Aedes aegypti - Larvicide
Data de publicação: 2006
