Abstract
The single-crystal X-ray structure determination of the product obtained from the methylation of 3,3-bis(2-furfurylamino)-N-(2-furoyl)(2-nitro)thioacrylamide, C14H12N4O4S, shows that the 4-methylthio-substituted 5-nitropyrimidine derivative was obtained, not the l-methyl-4-thioxo-substituted derivative as previously reported.