Jervine n. : A poisonous alkaloid resembling veratrine, and found with it in white hellebore (Veratrum album); -- called also jervina.

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Taxonomy
Jervine, free encyclopedia, smoothened, 11b, mL, birth defects, interaction, teratogen, hedgehog signaling, search, 3S, 6bS, 6a, 6b, 11a, hydroxy, tetramethyl, spiro.

Defination from the web:
Jervine is a steroidal alkaloid with molecular formula C27H39NO3 which is derived from the Veratrum plant genus. ... Jervine's biological activity is mediated via its interaction with the 7 pass trans membrane protein smoothened. ...