3-Pyridinecarbonitrile, 5-(4-cyanophenyl)-1,2-dihydro-6-methyl-2-oxo- 5-(4-Cyanophenyl)-1,2-dihydro-6-methyl-2-oxopyridin-3-carbonitrile 88594-78-9 Dpn 205-734 Dpn-205-734