1-(4-aminobutyl)-1H-imidazo[4,5-c]quinolin-4-amine 、
1-benzyl-1H-indole-3-carbonyl chloride 以to provide N3-[4-(4-amino-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-1-benzyl-1H-3-indolecarboxamide as a white powder, m.p. 139.0° C. (decomposition)的产率得到N3-[4-(4-amino-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-1-benzyl-1H-3-indolecarboxamide