3-Pyridinecarboxylic acid, 1,4,5,6-tetrahydro-5-cyano-2-methyl-4-(4-nitrophenyl)-6-thioxo-, ethyl ester 97651-06-4 Nicotinic acid, 1,4,5,6-tetrahydro-5-cyano-2-methyl-4-(p-nitrophenyl)-6-thioxo-, ethyl ester