2. Materials and Methods
2.1 Plant materials
K. parviflora rhizomes were bought from a Thai traditional drug store in Songkhla province, Thailand. The voucher specimen is SKP 2061116. The plant material was identified by Assoc. Prof. Dr. Sanan Subhadhirasakul and a voucher specimen is kept at the herbarium of the Faculty ofPharmaceutical Sciences, Prince of Songkla University,Songkhla, Thailand