1-(4-aminobutyl)-1H-imidazo[4,5-c]quinolin-4-amine 、
6-氯吡啶-3-羰酰氯 以to provide N3-[4-(4-amino-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-6-chloronicotinamide as an off white crystalline solid, m.p. 144.0-148.0° C. (decomposition)的产率得到N3-[4-(4-Amino-1H-imidazo[4,5-c]quinolin-1-yl)butyl]-6-chloronicotinamide