“…f.) Lindau, both belonging to the family Acanthaceae, are well-known medicinal plants widely used in Thai traditional medicine (Tiangburanatam, 1996) and are categorized as essential medicinal plants for primary healthcare by the Thai Ministry of Public Health (National Drug and Committee, 2006). Important constituent of Barleria lupulina extracts are iridoid glucosides (Byrne et al, 1987;Kanchanapoom et al, 2001;Suksamrarn, 1986;Suksamrarn et al, 2003;Tuntiwachwuttikul et al, 1998) and principle constituents of Clinacanthus nutans are flavonoids, stigmasterol, -sitosterol, lupeol, betulin, C-glycosyl flavones, vitexin, isovitexin, shaftoside, isomollupentin, 7-O--gluco pyranoside, orientin, isoorientin, cerebrosides monoacylmonogalactosylglycerol and sulfur-containing glucosides (Dampawan et al, 1977;Teshima et al, 1998;Tuntiwachwuttikul et al, 2004). The aerial part of Barleria lupulina has been traditionally used for mental tension, diabetes, rheumatoid arthritis and snake bite (Chopra et al, 1968).…”