Synthesis of [4-14C]theophylline.
D002250:Carbon Radioisotopes; D055598:Chemical Phenomena; D002621:Chemistry; D006801:Humans; D007553:Isotope Labeling / Q000379:methods; D013806:Theophylline / Q000138:chemical synthesis*
D002250:Carbon Radioisotopes; D013806:Theophylline