1-(4-aminobutyl)-2-methyl-1H-imidazo[4,5-c]quinolin-4-amine 、
异氰酸苯酯 以to provide 123 mg of N-[4-(4-amino-2-methyl-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-N′-phenylurea as a light brown solid, m.p. 171.5–172.5° C的产率得到N-[4-(4-amino-2-methyl-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-N'-phenylurea