mass spectra of digoxin and digitoxin ( the most widely prescribed drugs for treatment of congestive heart failure ) and a complete set of their 14 dihydro- and sugar-hydrolyzed metabolites have been obtained via laser desorption/ionization with a fourier transform ion cyclotron resonance ( ld/ft/icr ) mass spectrometer .
C0012258
digitoxin
C0018802
congestive heart failure