4,2'-difluoro-5'-(8-oxo-7,8-dihydroimidazo[1,2-a]pyrazin-3-yl)-biphenyl-2-carbonitrile
4,2'-difluoro-5'-(8-methoxy-imidazo[1,2-a]pyrazin-3-yl)-biphenyl-2-carbonitrile
5'-(8-chloro-imidazo[1,2-a]pyrazin-3-yl)-4,2'-difluoro-biphenyl-2-carbonitrile
4,2'-difluoro-5'-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-biphenyl-2-carbonitrile
5'-bromo-2',4-difluorobiphenyl-2-carbonitrile