scholarly journals Accurate mass measurement using Fourier transform ion cyclotron resonance mass spectrometry for structure elucidation of designer drug analogs of tadalafil, vardenafil and sildenafil in herbal and pharmaceutical matrices

2006 ◽  
Vol 20 (15) ◽  
pp. 2317-2327 ◽  
Author(s):  
Samuel R. Gratz ◽  
Bryan M. Gamble ◽  
Rick A. Flurer
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