podophyllin
/ˌpɒdəˈfɪlɪn/Chemistry
noun
A yellow, bitter resin with violent purgative properties, obtained from the dried rhizome of the mayapple, Podophyllum peltatum or P. hexandrum, and used externally as a paint to remove warts and verrucas.
Origin
Mid 19th century. From Podophyllum + -in.