toringin

\\təˈrinjə̇n\ noun (-s)

Etymology: New Latin toringo (specific epithet of Pyrus toringo, synonym of Malus sieboldii) (from Japanese, a crab apple tree) + English -in

: a crystalline flavone glucoside C₂₁H₂₀O₉ that occurs in the bark of a shrubby Japanese crab apple (Malus sieboldii) and in the buds of several poplars and that yields chrysin and glucose on hydrolysis