[CH3:1][NH:2][NH2:3].[CH:4](=O)[C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1.[CH3:12][S:13][C:14](=[C:17]([C:20]#[N:21])[C:18]#[N:19])SC>COCCO>[CH3:1][N:2]([C:14]([S:13][CH3:12])=[C:17]([C:20]#[N:21])[C:18]#[N:19])[N:3]=[CH:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1Methyl hydrazine (4.2 g) was added slowly to benzaldehyde (9.4 ml) in 2-methoxyethanol (15 ml) causing the solution to boil. The solution was heated under reflux for 20 minutes and was then added to a solution of bis(methylmercapto)methylenemalononitrile (15.6 g) in 2-methoxyethanol (75 ml). The solution was heated under reflux for 6 hours and was then cooled to 0° C. to precipitate benzaldehyde N-methyl-N-(2,2-dicyano-1-methylmercaptoethenyl) hydrazone (5.6 g), m.p. 159°-160° C.
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