Return to Article Details DIPYRROLO[1,2-<i>a</i>;2',1'-<i>c</i>]PYRAZINES. 5. AZO COUPLING OF DIPYRROLO[1,2-<i>a</i>;2',1'-<i>c</i>]PYRAZINES AND 5,6-DIHYDRODIPYRROLO[1,2-<i>a</i>;2',1'-<i>c</i>]PYRAZINES Download Download PDF