Crystamidine is a new Erythrina alkaloid, which has been isolated from Erythrina crysta-galli LINN. (Japanese name : Hosoba Deiko) (Leguminosae) along with six known bases, N-nororientaline (I), erybidine (II), erythraline (III), erythrinine (IV), erysodine (VI) and erysotrine (VII). Chemical and spectral investigations of crystamidine showed that it should have the stereostructure (VIII).
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Ito et al. (1976) studied this question.
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