[CONTRIBUTION TO THE DETERMINATION OF PURINE BASES].
D064751:Ammonium Compounds; D002110:Caffeine; D004396:Coloring Agents; D007202:Indicators and Reagents; D011687:Purines; D000644:Quaternary Ammonium Compounds; D012106:Research; D013805:Theobromine; D013806:Theophylline; D013876:Thiophenes
D064751:Ammonium Compounds; D004396:Coloring Agents; D007202:Indicators and Reagents; D011687:Purines; D000644:Quaternary Ammonium Compounds; D013876:Thiophenes; D002110:Caffeine; D013806:Theophylline; D013805:Theobromine; C030985:purine
AMMONIUM COMPOUNDS; CAFFEINE; DYES; EXPERIMENTAL LAB STUDY; INDICATORS AND REAGENTS; PURINES; THEOBROMINE; THEOPHYLLINE; THIOPHENES
CONTRIBUTION 'A LA D'ETERMINATION DE BASES PURIQUES.