The 5-(isopropylidene)-2-thiobarbituric acid: Preparation, crystal structure, thermal stability and IR-characterization / N. N. Golovnev, M. S. Molokeev, L. S. Tarasova [et.al.] // Journal of molecular structure. 2014. Vol. 1068. P. 216-221. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000492742