lupulin
  蛇麻素; 啤酒花苦味素
  lu·pu·lin /ˈlupjələn/ 名詞
  Lu·pu·lin n.
  1. Chem. A bitter principle extracted from hops.
  2. The fine yellow resinous powder found upon the strobiles or fruit of hops, and containing this bitter principle. [Written also lupuline.]
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