structure (R 1 R 2 N)(R 3 R 4 N)C=S. Thioureas are related to thioamide s, e.g. RC(S)NR 2 , where R is methyl , ethyl , etc. Read more... Edit at Wikipedia... Other names Thiourea (IUPAC Name); beta-Thiopseudourea; Carbamimidothioic acid; imidazolidin-4,5-dioxo-2-ylidene; 1-Amino-1-imino-methanethiol; thiocarbamide References Please add any relevant references here.