(7,7'-Bi-1H-1,5-benzodiazepine)-2,2'-dicarbonitrile, 2,2,'3,3',4,4',5,5'-octahydro-4,4'-diphenyl- 1H-1,5-Benzodiazepine-2-carbonitrile, 7,7'-bis(2,3,4,5-tetrahydro-4-phenyl- 87896-39-7