1-[2-(2,4-Dinitrophenyl)-hydrazono-2-ethoxycarbonylethyl]-1-ethyl-1,2,3,4,6,7-hexahydro-(12H)-indolo[2,3-a]-quinolizin-5-ium bromide 生成 ethyl (2Z)-3-[(1R,12bS)-1-ethyl-3,4,6,7,12,12b-hexahydro-2H-indolo[2,3-a]quinolizin-1-yl]-2-[(2,4-dinitrophenyl)hydrazinylidene]propanoate