6-benzyl-2-chloro-8-methyl-7,8-dihydro-5H-1,6-naphthyridine 、
环丁醇 以2-cyclobutoxy-8-methyl-5,6,7,8-tetrahydro-1,6-naphthyridine hydrochloride (0.124 g, 27%) was obtained as a white powder的产率得到2-cyclobutoxy-8-methyl-5,6,7,8-tetrahydro-1,6-naphthyridine hydrochloride