2-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzonitrile-D5; 2-(2-oxo-1-phenyl-5-pyridin-2-ylpyridin-3-yl)benzonitrile-D5;2-(6'-oxo-1'-phenyl-1',6'-dihydro-2,3'-bipyridin-5'-yl)benzonitrile-D5;2-(6'-Oxo-1'-Phenyl[1',6'-Dihydro[2,3'-Bipyridine]]-5'-Yl)benzonitrile-D5;2-(6-Oxo-1-phenyl-1,6-dihydro-[2,3-bipyridin]-5-yl)benzonitrile-D5;2-(6'-Oxo-1'-phenyl-1',6'-dihydro[2,3'-bipyridin]-5'-yl)benzonitrile-D5;3-(2-Cyanophenyl)-1-phenyl-5-(2-pyridyl)-1,2-dihydropyridin-2-one-D5
