7-Ethyl-2,3-dimethoxy-8-oxo-5,7,8,9-tetrahydro-6H-9-aza-6a-azonia-benzo[6,7]cyclohepta[1,2-a]naphthalene; bromide 在
sodium tetrahydroborate 作用下,
以
乙醇 为溶剂,
生成 (7S,13bR)-7-Ethyl-2,3-dimethoxy-5,6,9,13b-tetrahydro-6a,9-diaza-benzo[6,7]cyclohepta[1,2-a]naphthalen-8-one 、 (7R,13bR)-7-Ethyl-2,3-dimethoxy-5,6,9,13b-tetrahydro-6a,9-diaza-benzo[6,7]cyclohepta[1,2-a]naphthalen-8-one