c20h38

from The Collaborative International Dictionary of English v.0.48
Eikosylene \Ei*kos"y*lene\, n. [Gr. e'i`kosi twenty +
   acetylene.] (Chem.)
   A liquid hydrocarbon, {C20H38}, of the acetylene series,
   obtained from brown coal.
   [1913 Webster]
    

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