n. A difficultly crystallizable alkaloid, C17H21NO4 + H2O, obtained from Scopolina carniolica, S. Japonica, Duboisia myoporoides, Atropa Belladonna, Datura Stramonium, and other plants of the Solanaceæ: identical with hyoscine. The hydrobromide is most used. It is a soporific and anesthetic.