n :  either of two lactones that occur as glycosides in the rootstock of the mayapple (Podophyllum peltatum) and have some antineoplastic activity:  a  or  a-pel*ta*tin   :  one C₂₁H₂₀O₈ containing two hydroxyl groups  b  or  b-pel*ta*tin   :  one C₂₂H₂₂O₈ containing only one hydroxyl group with the other replaced by a methoxyl group .
 
 
 
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