2,4-Dichloro-5-cyanopyrimidine3177-24-031 % similar 3-Chloro-4-cyanopyridine68325-15-531 % similar 3-Amino-4-cyanopyridine78790-79-131 % similar 4-Chloro-nicotinonitrile89284-61-731 % similar 3-Bromo-4-chloro-1H-pyrrolo[2,3-b]pyridine-5-carbonitrile1262411-25-530 % similar