1-(1-Cyanocyclohexyl)piperidine hydrobromide 1-Piperidinocyclohexanecarbonitrile hydrobromide 76008-48-5 Cyclohexanecarbonitrile, 1-(1-piperidinyl)-, hydrobromide Cyclohexanecarbonitrile, 1-piperidino-, hydrobromide PCC hydrobromide