salicin

A bitter glucoside, C₁₃H₁₈O₇, obtained mainly from the bark of poplar and willow trees and formerly used as an analgesic.

A neutral crystalline glucoside (C₁₃H₁₈O₇), of a bitter taste.

A glucoside found in the bark and leaves of several species of willow (Salix) and poplar, and extracted as a bitter white crystalline substance.

A glucoside derivative of salicylic acid; the active principle of willow bark, once used medicinally.