. . . . . . . . . . . . . . . "nicarbazin" . . . . "Nicarbazin" . . . . . . . . . "Nicarbazin" . . "N,N\u2032-Bis(4-nitrophenyl)urea\u20144,6-dimethylpyrimidin-2(1H)-one (1/1)" .