192 Russian Chemical Bulletin, Vol. 4d, No. I, January, I997 ... Synthesis and structure of 6-amino-3,5-dicyano- 4-heptyipyridine-2(IH)-thione ... K D. Dyachenko, a VN Nesterov, b* SG Krivokolysko,* and K P. Litvinov r ... Condensation of caprylic aldehyde with cyanothioacetamide taken in a ratio of I : 2 affords 6-amino-3,5-dicyano-4-heptyloyndine-2(IH)-thione. The structure of the thione was studied by X-ray structural analysis. ... Key words: caprylic aldehyde, ...