pip·er·ine /ˈpɪpəˌrin/
  胡椒鹼
  pip·er·ine /ˈpɪpəˌrɪn/ 名詞
  Pip·er·ine n.  Chem. A white crystalline compound of piperidine and piperic acid. It is obtained from the black pepper (Piper nigrum) and other species.
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  piperine
       n : derived from pepper (especially black pepper); source of the
           hotness of black and white pepper [syn: piperin]