Structurally diverse spirocyclic polycyclic polyprenylated acylphloroglucinols from Hypericum ascyron Linn. and their anti-tumor activity
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Ten spirocyclic polycyclic polyprenylated acylphloroglucinols (PPAP), hunascynols A-J (1-10), and 12 known analogs were isolated from the aerial parts of Hypericum ascyron Linn. Compounds 1 and 2, which share a 1,2-seco-spirocyclic PPAP skeleton, could be deri... ...
