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The chemical structures of spiramine H, I and O


, : The chemical structures of spiramine H, I and O. Acta Botanica Yunnanica 16(3): 301-304

The new Atisine-type diterpenoid alkaloids spiramine H(1), I(2) and O(3) were isolated from the roots of Spiraea japonica var. acuminata Franch. Their structures were elucidated by means of spectroscopic analysis and chemical conversions.

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