7,8,13,13a-tetrahydro-3,4,10,11-tetramethoxy-6-methyl-8-oxo-5H-isoindolo[1,2-b][3]benzazepinium iodide ethylene acetal 在
氢氧化钾 作用下,
以93%的产率得到5,6,13,13a-tetrahydro-2,3,9,10-tetramethoxy-7-methyl-5-oxo-8H-dibenzo[a,g][3]quinolizinium iodide ethylene acetal