2-甲基吲哚 、
二氧化碳 、 3-ethyl-1-methyl-5-methoxycarbonylpyridinium iodide 生成 methyl (2RS,6RS,12RS)-12-ethyl-3-methyl-1.2.3.6-tetrahydro-2,6-methanoazocino<4,3-b>indole-5-carboxylate 、
methyl (2RS,5SR,6RS)-5-ethyl-12-methyl-1.2.5.6-tetrahydro-2,6-iminocyclooctaindole-3-carboxylate 、 methyl (1RS,5RS,12SR)-12-ethyl-2-methyl-1.2.5.6-tetrahydro-1,5-methanoazocino<4,3-b>indole-4-carboxylate