: B 2515 (OTTO) 5-Bromo-2-cyanopyridine, 97% Cas 97483-77-7 - used in the synthesis of aza-terphenyl diamidine analogs, which exhibits potent antiprotozoal activity. B 2515 (OTTO) 5-Bromo-2-cyanopyridine, 97% Cas 97483-77-7 - used in the synthesis of pyridine-diketopyrrolopyrrole(PyDPP), a building block for preparing low band-gap copolymers for use as electron donor in polymer solar cells.