Pentace burmanica Kurz, Thai medicinal plant, is commonly used for treatment of diarrhea. In this study, the
antioxidant activities, total phenolic, non-tannin phenolic and total tannin contents of Pentace burmanica stem bark
from 12 different Thailand markets were investigated.A simple and reliable method to determine (+)-catechin and (-
)-epicatechin contents was performed by high performance liquid chromatography (HPLC).