hydrastine

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hy·dras·tine

 (hī-drăs′tēn′, -tĭn)
n.
A poisonous white alkaloid, C21H21NO6, obtained from the root of the goldenseal and formerly used locally to treat inflammation of mucous membranes.

[New Latin Hydrastis, plant genus + -ine.]

hydrastine

(haɪˈdræstiːn; -tɪn)
n
(Elements & Compounds) a white poisonous alkaloid extracted from the roots of the goldenseal: has been used in medicine (in the form of one of its water-soluble salts) to contract the uterus and arrest haemorrhage. Formula: C21H21NO6
[C19: from hydrast(is) + -ine2]