“…The various activities associated with chromones include antioxidant (Gomes et al, 2009;Shanthi et al, 2013;Phosrithong et al, 2012), anti-inflammatory (Khadem and Marles, 2012;Deshmukh et al, 2009), antiulcer (Lemos et al, 2012, biocidal (Sharma et al, 2011), wound healing (Hajhashemi et al, 2012), immune stimulatory, (GamalEldeen et al, 2007) etc. Khelin 1 was the first chromone extracted from Ammi visnaga, used as a diuretic to relieve renal colic (Edwards and Howell, 2000), as a smooth muscle relaxant (Nordlund, 2006) and in the treatment of vitiligo, a pigmentation disorder (De Leeuw et al, 2011). Other chromone derivatives for example sodium cromoglycate 2, diosmin 3 and flavoxate 4 are used as a mast cell stabilizer in allergic asthma and allergic conjunctivitis, for the treatment of various diseases and as a smooth muscle relaxant to treat urge incontinence (Holgate and Polosao, 2008;Frick, 2000;Ruffmann, 1988).…”