The swansonine and castanospermine synthesis pathway

Both castanospermine and swansonine occur in some legume plants, such as Castanospermum australe and Swainsona canescens respectively. They are hybrid molecules compounded of pyrrohzidine and quinolizidine alkaloids, and have shown some resistance to the AIDS virus. Certainly, the above-mentioned alkaloids are also toxic for animals. 

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FIGURE 2.30 Diagram of the swansonine and castanospermine synthesis pathway. 

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