Detection of theophylline and theobromine by reactions with mercury (II) cyanide.
D002110:Caffeine / Q000032:analysis; D055598:Chemical Phenomena; D002621:Chemistry; D003486:Cyanides; D008628:Mercury; D013805:Theobromine / Q000032:analysis*; D013806:Theophylline / Q000032:analysis*; D014970:Xanthines / Q000032:analysis
D003486:Cyanides; D014970:Xanthines; D002110:Caffeine; D013806:Theophylline; D008628:Mercury; D013805:Theobromine