20)11-26-19(25)12-6-2-1-3-7-12/h1-9,15-18,20-24H,10-11H2/t15-,16-,17+,Populin is a glucoside occurring in the bark, buds and leaves of certain species of poplar. The alkaline cleavage of populin produces benzoate and the glucoside salicin. Populin is a glucoside occurring in the bark, buds and leaves of certain species of poplar. The alkaline cleavage of populin produces benzoate and the glucoside salicin.