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Physalin
Physalins are steroidal constituents of ''Physalis'' plants which possess an unusual 13,14-seco-16,24-cyclo-steroidal ring skeleton (where the bond that is normally present between the 13 and 14 positions in other steroids is broken while a new bond between positions 16 and 24 is formed; see figure below). Since the isolation and the structure determination of Physalin A and Physalin B in 1969, more than a dozen Physalins were isolated from ''Physalis'' species, ''Physalis alkekengi'', ''Physalis angulata'', and ''Physalis lancifolia''. These compounds have antimicrobial, and antiparasitic effects. ==References==
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