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New physalins from physalis angulata and physalis lanceifolia structure and reactions of physalin d physalin i physalin g and physalin k



New physalins from physalis angulata and physalis lanceifolia structure and reactions of physalin d physalin i physalin g and physalin k



Phytochemistry 19(6): 1175-1182



The structures of physalins, I, G and K are established, respectively, as 5,6-dihydro-5.alpha.-methoxy-6.beta.-hydroxy, 4,5-dehydro-5,6-dihydro-4.beta.-hydroxy and 5,6-dihydro-4.alpha.,5.alpha.-epoxy-6.alpha.-hydroxy derivatives of physalin B. The chemistry of physalin D, and the synthesis of physalins D and I from physalin F and physalin K from physalin G are described.

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