10-bromooxy-3a-bromo-4,4,11a-trimethoxy-5-methyl-11-oxo-3a,4,11,11a-tetrahydro-[1,3]dioxolo[4,5-b]acridinium; bromide 在
sodium hydroxide 、
silver nitrate 作用下,
以
氯仿 为溶剂,
生成 3a,4,4,11a-tetramethoxy-5-methyl-3a,11a-dihydro-4
H,5
H-[1,3]dioxolo[4,5-
b]acridine-10,11-dione