title: Tautomerism of purines. I. N(7)H in equilibrium N(9)H equilibrium in adenine.
mesh_terms: D000225:Adenine; D006863:Hydrogen-Ion Concentration; D007536:Isomerism; D009904:Optical Rotation; D013696:Temperature; D013816:Thermodynamics; D014867:Water
chemical_list: D014867:Water; D000225:Adenine