Reduction of quaternary pteridines and purines by sodium borohydride.
D001896:Boron Compounds; D007259:Infrared Rays; D009682:Magnetic Resonance Spectroscopy; D010084:Oxidation-Reduction; D011621:Pteridines; D011687:Purines; D011743:Pyrimidines; D000644:Quaternary Ammonium Compounds; D013053:Spectrophotometry; D013057:Spectrum Analysis
D001896:Boron Compounds; D011621:Pteridines; D011687:Purines; D011743:Pyrimidines; D000644:Quaternary Ammonium Compounds