Abstract
The structure of a new crystalline base (melting point (mp) 167–169°C) obtained from Fritillaria imperialis was elucidated as (20R, 25R)-5α,17β-cevanine-3β,6β-diol, X-ray diffraction analysis of the mono-hydrate. The base was found to be identical with persicanidine B and also with harepermine.
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