Erythrina alkaloids
group of chemical compounds
Erythrina alkaloids, generally containing benzyl-tetrahydroisoquinoline structure, are widely distributed in Erythrina species, a genus of plants which belong to the Fabaceae family in tropical and subtropical regions. The Erythrina alkaloids can be found in several organs of Erythrina trees but are primarily found in their seeds. They display several unique properties, and are the subject of active scientific research relating to their synthesis and bioactivity.
Two kinds of alkaloids are isolated from the Erythrina plants. One is Erythrina alkaloid, the other one is HomoErythrina alkaloid. The shared feature of Erythrina alkaloids is the Erythrinane skeleton, which is a tetracyclic spiroamine structure containing 4 rings, labeled A, B, C and D, respectively.
Structure
The skeletal structures of both Erythrina and HomoErythrina alkaloid contain 4 rings. The D ring is generally aromatic. It can be benzene or heterocyclic ring. The difference between Erythrina and HomoErythrina alkaloids is the C ring's member amount.
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