noscapine

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nos·ca·pine

 (nŏs′kə-pēn′)
n.
A nonnarcotic alkaloid obtained from the opium poppy, C22H23NO7, that has antitussive and antitumor properties and has been used as a cough suppressant.

[Alteration (influenced by Latin nōscere, to get to know; see notion) of gnoscopine, a racemic mixture of noscapine and its enantiomer : Greek (gi)gnōskō, first person singular of gignōskein, to know (from the fact that it was previously unknown); see gnō- in Indo-European roots + op(ium) + -ine.]