(1,4-dimethyl-pyrrolidin-2-yliden)-acetaldehyde phenylimine 、 alkaline earth salt of/the/ methylsulfuric acid 在
吡啶 、
乙酸酐 作用下,
生成 1-(1-ethyl-5,6-dichloro-3-methyl-1(3)
H-benzimidazol-2-yl)-3-(1,4-dimethyl-4,5-dihydro-3
H-pyrrol-2-yl)-trimethinium ; perchlorate