Stemona parviflora

The roots of Stemona parviflora contain the alkaloids parvistemonamide... 

There are six species of stemona plants growing in China Stemona tuberosa Lour. St. sessilifolia (Miq) French, et Savat, St. japonica (Blume) Miq., St. parviflora C.H. Wright, St. mairei Levi and Croomia japonica Miq. The first three plants are used in TCM and the latter three are used in folk medicine as insecticide, too. In the past, eleven stemona alkaloids have been separated from the roots of the first three Stemona plants and their structures were determined mostly by X-ray crystallography analyses due to the complexity of these structures. (Table 7 and Scheme 15) [58,59]. There are also several other stemona alkaloids, which have been reported, but their structures are unknown. 

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