Beta-orcinol depsidones from the lichen Usnea sp. from Sri Lanka.
Two beta-orcinol depsidone lactones, the methyl ethers of menegazziaic acid and stictic acid were isolated along with glyceryl trilinolate and usnic acid from an Usnea sp. new to Sri Lanka growing on rotting trees of Acacia decurrans. Usnic acid exhibited potent antitermite activity against a common pest of tea, Glyptotermes dilatatus, at low elevations.
Kathirgamanathar
Selvaluxmy
S
Department of Chemistry, University of Peradeniya, Peradeniya, Sri Lanka.
Williams
David E
DE
Andersen
Raymond J
RJ
Bombuwela
Karunananda
K
De Silva
Dilip
D
Karunaratne
Veranja
V
D000818:Animals; D001572:Benzofurans / Q000302:isolation & purification / Q000494:pharmacology; D007300:Insect Control; D020049:Isoptera; D007783:Lactones / Q000302:isolation & purification*; D013188:Sri Lanka; D014197:Trees; D020949:Usnea / Q000737:chemistry*
D001572:Benzofurans; D007783:Lactones; C073339:usnic acid