Mass spectrometry of selected natural products.
D000470:Alkaloids / Q000032:analysis*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D009020:Morphine; D010208:Papaverine; D013057:Spectrum Analysis; D015016:Yohimbine
D000470:Alkaloids; D015016:Yohimbine; D009020:Morphine; D010208:Papaverine