3-pyridinecarbonitrile, 4-[(3,5-dimethylphenyl)methyl]-5-ethyl-1,2-dihydro-6-hydroxy-2-oxo- 4-(3,5-dimethylbenzyl)-5-ethyl-6-hydroxy-2-oxo-1,2-dihydropyridine-3-carbonitrile InChI=1/C17H18N2O2/c1-4-13-14(15(9-18)17(21)19-16(13)20)8-12-6-10(2)5-11(3)7-12/h5-7H,4,8H2,1-3H3,(H2,19,20,21