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valerylene

ˈvalerylene Chem.
  [f. as prec. + -ene.]
  A hydrocarbon homologous with acetylene.

1868 Watts Dict. Chem. V. 981 Valerylene..is a colourless very mobile liquid, which floats on water, and is nearly insoluble therein. 1873 Rolfe Phys. Chem. p. xviii, Quintine or Valerylene.

Oxford English Dictionary

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