Spasmolytic substances from Cimicifuga dahurica Maxim.

Abstract
The search for spasmolytic principals of Cimicifuga dahurica MAXIM. (Ranunculaceae) with the guidance of the intestinal action resulted in the isolation of 2 active substances, visamminol and visnagin, in addition to isoferulic acid and norvisnagin. Norvisnagin was 1st isolated from a natural source. Pharmacological estimations using guinea pig jejunum revealed that the spasmolytic actions of visamminol and visnagin were 1/3 and 1/10 that of papaverine hydrochloride, respectively. Norvisnagin showed inactivity.

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