4-(4-amino-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-1-yl)butaneamine 、
2-喹喔啉羧酸 以to provide 270 mg of N-{4-[4-amino-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-1-yl]butyl}quinoxaline-2-carboxamide as a yellow crystalline solid, m.p. 85-87° C的产率得到N-{4-[4-amino-2-(2-methoxyethyl)-1H-imidazo [4,5-c]quinolin-1-yl]butyl}quinoxaline-2-carboxamide