1-(4-aminobutyl)-2-butyl-1H-imidazo[4,5-c]quinolin-4-amine 、
异氰酸苯酯 以to provide 0.75 g of N-[4-(4-amino-2-butyl-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-N′-phenylurea as white needles, m.p. 185-187° C的产率得到N-[4-(4-amino-2-butyl-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-N'-phenylurea