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C9H8O4

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Caffeic \Caf*fe"ic\, a. [See {Coffee}.] (Chem.)
   Pertaining to, or obtained from, coffee.

   {Caffeic acid}, an acid obtained from coffee tannin, as a
      yellow crystalline substance, {C9H8O4}.
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