SEARCH Articles Figures Tables 2,2 -bipyrrole aldehyde 2.2 -Bipyrroles 2.2 -Bipyrroles 5,5 -Acyl bipyrroles Bipyrrole Bipyrrole 1//-pyrrole Bipyrrole diacid Bipyrrole pyrrolyl Bipyrrole, 2,2 - spectra Diformyl 2,2 -bipyrrole Halogenated bipyrroles Heptachloro-1 -methyl-1,2 -bipyrrole Hexahalogenated bipyrroles Pyrroles bipyrroles