(1,1'-Biphenyl)-4-carbonitrile, 4'-pentyl- 118217-27-9 4'-Pentyl(1,1'-biphenyl)-4-carbonitrile 4-Cyano-4'-pentylbiphenyl 40817-08-1 99039-09-5 EINECS 255-093-2 PCB p-Cyano-p'-pentylbiphenyl