- a white, bitter-tasting, water-soluble, glycosidic powder, C20H27NO11, usually obtained from bitter almond seeds and the leaves of plants of the genus Prunus and related genera: used chiefly in medicine as an expectorant.
- a white soluble bitter-tasting crystalline glycoside extracted from bitter almonds and stone fruits such as peaches and apricots. Formula: C 6 H 5 CHCNOC 12 H 21 O 10
