Abstract: Ten 4-nitrodiphenylether-4′-thiocarbamides were synthesized from 4-nitro-4′-thiocyanodiphenylether and corresponding amines. Preliminary screening data in table 1 showed that most of them exhibited insignificant or low activity against schistosoma japonicnm in mice, while V₉ with a diethyl substituted nitrogen in thiocarbamide structure was found to possess antischistosomal activity as high as that of nithiocyamine (Amoscanatec₉₃₃₃ GO/COP 4540).