Solanine

from The Collaborative International Dictionary of English v.0.48

Solanine \Sol"a*nine\, n. [L. solanum nightshade.] (Chem.)
   A poisonous alkaloid glucoside extracted from the berries of
   common nightshade ({Solanum nigrum}), and of bittersweet, and
   from potato sprouts, as a white crystalline substance having
   an acrid, burning taste; -- called also {solonia}, and
   {solanina}.
   [1913 Webster]