Karawek is an endemic plant of Thailand. The genus of Karawek, Artabotrys,contains over 100 species of scandent shrubs and woody climbers dispersed largely in tropical and subtropical zones of the world, particularly tropical Africa and Eastern Asia (Tan and Wiart, 2014). Apart from producing unique and good aroma, flowers of Karawek were ethnomedicinally used as cardiotonic (Chuakul and Soonthornchareonnon,2003).