6-benzyl-2-chloro-8-methyl-7,8-dihydro-5H-1,6-naphthyridine 、
异丙醇 以2-isopropoxy-8-methyl-5,6,7,8-tetrahydro-1,6-naphthyridine hydrochloride (0.170 g, 38%) was obtained as a white powder的产率得到2-isopropoxy-8-methyl-5,6,7,8-tetrahydro-1,6-naphthyridine hydrochloride