Determination of fraxinellone in root bark of Dictamnus dasycarpus by RP-HPLC Simultaneous determination of three active compounds in root barks ofDictamnus dasycarpus by RP-HPLC Developmental Anatomy of Dictamnus dasycarpus Roots Anatomical Structures of Vegetable Organs of Dictamnus dasycarpus and Dictamnine Accumulation