tert-Butyl 3-(4-(benzyloxy)-2-oxopyridin-1(2H)-yl)-5-methyl-6,7,8,9,10,11-hexahydro-7,11-imino-5H-cyclooct[b]indole-12-carboxylate 以86%的产率得到4-(Benzyloxy)-1-(5-methyl-6,7,8,9,10,11-hexahydro-7,11-imino-5H-cyclooct[b]indol-3-yl)pyridin-2(1H)-one hydrochloride