(2008/06/13)
3-(N,N-diphenylcarbamyloxy)-4-hydroxy-2,5-diphenylthiophene-1,1-dioxide
3-(phenylcarbamyloxy)-4-hydroxy-2,5-diphenylthiophene-1,1-dioxide
N,N-diphenylurea
3-(N,N-Diethylcarbamyloxy)-4-hydroxy-2,5-diphenylthiophene-1,1-dioxide
3-(benzylcarbamyloxy)-4-hydroxy-2,5-diphenylthiophene-1,1-dioxide