NEW HETEROCYCLIC RING-SYSTEMS - THE SYNTHESES OF 2H,3H,7H-IMIDAZO[1',2' 1,2]PYRIDO[4,3-B]INDOLES AND ,3H,4H,8H-PYRIMIDO[1',2'/1,2]PYRIDO[4,3-B]INDOLES/
K. Harada et al., NEW HETEROCYCLIC RING-SYSTEMS - THE SYNTHESES OF 2H,3H,7H-IMIDAZO[1',2' 1,2]PYRIDO[4,3-B]INDOLES AND ,3H,4H,8H-PYRIMIDO[1',2'/1,2]PYRIDO[4,3-B]INDOLES/, Heterocycles, 38(8), 1994, pp. 1867-1880