Studies on water-soluble constituents in rhizome of Polygonum cuspidatum Effects of processing on piceid and emodin in Polygonum cuspidatum Construction of RNA interference vector of Polygonum cuspidatum chalcone synthase gene and its genetic transformation Anti-complementary anthraquinones from Polygonum cuspidatum and their action targets Chemical constituents in flowers of Polygonum cuspidatum Study on HPLC-DAD-ELSD fingerprint of Polygoni Cuspidati Rhizoma et Radix