HPLC Analysis on Influence of Processing on Contents of Genkwanin in Flos Genkwa Fingerprint analysis of Flos Genkwa by HPLC Determination of Hydroxygenkwanin and Genkwanin in Flos Genkwa before and after Processing by TLC-scanner Influence of Processing on Contents of Genkwauin in Flos Genkwa Determination of Genkwanin in Flos Genkwa by HPLC Quantitative Determination of Genkwanin in Flos Genkwa by TLC-densitometry