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  1. Propyne | CH3-C=CH | CID 6335 - PubChem

  2. Propyne - Wikipedia

  3. Propyne - NIST Chemistry WebBook

  4. Propyne - NIST Chemistry WebBook

  5. Propyne | C3H4 - ChemSpider

  6. Propyne Structure - C3H4 - Over 100 million chemical

  7. Propyne | Formula, Properties & Application

  8. Propyne Formula & Structure - Purdue University

  9. Propyne - Wikiwand articles

  10. Propyne - Purdue University