Objective A method for simultaneous determination of Rehmaionoside A,ophiopogonin D,protostemonine is implemented to control the quality of Yuehua pill( capsule) and its composition into the blood via HPLC. Methods With rehmaionoside A,ophiopogonin D and protostemonine as control,this research uses Hypersil BDS C18column( 250 mm × 4. 6,mm,5um),in this circumstance,ophiopogonin D: mobile phase acetonitrile: water( 48: 52),the detection wavelength: 208nm; rehmaionoside A mobile phase acetonitrile: water( 6: 94),the detection wavele...