Three new indole alkaloids, named bruceollines D-F, were isolated from
the root wood of Brucea mollis var. tonkinensis. On the basis of spec
tral and chemical evidence, the structures of bruceollines D-F were el
ucidated as 8,8-dimethylcyclopenta[b]indole-9-one, 8,8-dimethylcyclope
nta[b]indole-9,10-dione, and oxy-3'-methyibutyl)-1N-beta-D-glucopyrano
sylindole respectively.