title: Field desorption mass spectrometry of azathioprine and its metabolites.
mesh_terms: D000818:Animals; D001379:Azathioprine / Q000032:analysis* / Q000652:urine; D013058:Mass Spectrometry / Q000379:methods; D008970:Molecular Weight; D051381:Rats
chemical_list: D001379:Azathioprine