title: Studies in the imidazo(1,5-a)pyrazine system.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D007093:Imidazoles / Q000138:chemical synthesis*; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D011522:Protons; D011719:Pyrazines / Q000138:chemical synthesis*
chemical_list: D007093:Imidazoles; D011522:Protons; D011719:Pyrazines