3-Pyridinecarbonitrile, 5-((3-chlorophenyl)azo)-1,2-dihydro-6-hydroxy-4-methyl-2-oxo-1-(phenylamino)- 5-((3-Chlorophenyl)azo)-1,2-dihydro-6-hydroxy-4-methyl-2-oxo-1-(phenylamino)nicotinonitrile 68214-64-2 EINECS 269-306-1