1-2-(1-(4,5-Dihydroimidazolyl))ethyl-3-2-(1-imidazolyl)ethyl-2-thiourea 63917-26-0 N-(2-(4,5-Dihydro-1H-imidazol-1-yl)ethyl)-N'-(2-(1H-imidazol-1-yl)ethyl)thiourea USAF A-6231 Urea, 1-(2-(4,5-dihydro-1H-imidazol-1-yl)ethyl)-3-(2-(1H-imidazol-1-yl)ethyl)-2-thio-