coniceine

from The Century Dictionary.

• noun An alkaloid, C₈H₁₅N, which exists in three forms — α-and β-coniceine, obtained by heating conhydrine with hydrochloric acid (the first is a liquid which boils at 158° C., the second melts at 41° C.), and γ-coniceine, found in crude conine. The last boils at 173° C. and is 18 times more poisonous than conine, which it resembles.