1-(8-aminooctyl)-2-butyl-1H-imidazo[4,5-c]quinolin-4-amine 、
异氰酸苯酯 以to provide 1.59 g of N-[8-(4-amino-2-butyl-1H-imidazo[4,5-c]quinolin-1-yl)octyl]-N′-phenylurea as an off white powder, m.p. 153-155° C的产率得到N-[8-(4-amino-2-butyl-1H-imidazo[4,5-c]quinolin-1-yl)octyl]-N'-phenylurea