Abstract
Four new dimeric indole alkaloids, named ervahaimine A, ervahaimine B, ervahainamide A, and ervahainamide B, were isolated from the roots of Ervatamia hainanensis. The structures of these new alkaloids have been elucidated by spectral data in correlation with compounds of established structures. The structure of ervahaimine A and ervahaimine B have been confirmed by partial synthesis
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