QUANTIFY COMPOUNDS IN RAU MEO HERBAL (Orthosiphon stamineus Benth) COLLECTED IN THAI NGUYEN PROVINCE

Abstract

The scientific name of Rau Meo is Orthosiphon stamineus Benth, commonly known as Bong Bac, in the family of Lamiaceae. In the world, Orthosiphon stamineus Benth is the typical tropical plant. They usually grow wild in India, Indonesia, Malaysia, Thailand, Indochina and Africa. In Viet Nam, Rau Meo is very sparsely distributed in deltas and the mountainous regions as Cao Bang, Thai Nguyen, Thanh Hoa, Ha Noi (Ba Vi), Lam Dong, Phu Yen (Tuy Hoa), Ninh Thuan (Phan Rang), Kien Giang (Phu Quoc). In early time, people have known functions of this plant as cooling, diuretic, treats rheumatism, treats biliary obstruction. Recent researchs found that sinensetin extract in this plant has potential of Vietnamese exporting economic. However, sinensetin content has changed by ecological conditions in regions. In this study, we have analyzed some contents of trunks and leaves of this plant extracts, which is grown in Thai Nguyen. We has conducted qualitative by thin-layer chromatography method and simultaneously quantified by high-performance liquid chromatography (HPLC), we have identified some herbal extracts in this plant, which are sinensetin, ursolic acid, rosmarinic acid. Sinensetin, ranging from 0.0112  to  0.0195%, averaging at 0.0154% of dry material. Rosmarinic acid, ranging from 0.0769 to 0.2231%, averaging at 0,1618% of dry material. Ursolic acid, ranging from 0,0055 to 0,0301%, averaging at 0,0146% of dry material.