peltatin

noun

pel·​ta·​tin pel-ˈtāt-ᵊn 

: either of two lactones that occur as glycosides in the rootstock of the mayapple (Podophyllum peltatum) and have some antineoplastic activity:

a

or α-peltatin

ˈal-fə- 

: one C₂₁H₂₀O₈ containing two hydroxyl groups

b

or β-peltatin

ˈbāt-ə-, chiefly British ˈbēt-ə-

: one C₂₂H₂₂O₈ containing only one hydroxyl group with the other replaced by a methoxyl group