Return to Article Details Dipyrrolo[1,2-<i>a</i>; 2′,1′-<i>c</i>]pyrazines. 3. Electrophilic substitution in a series of derivatives 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