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  1. Propyne - Wikipedia

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

  3. Propyne - NIST Chemistry WebBook

  4. 3.7: Alkynes - Chemistry LibreTexts

  5. Propyne Structure - C3H4 - Over 100 million chemical ...

  6. Structural Formula for Propyne, CH3C≡CH or C3H4. - YouTube

  7. Propyne | C3H4 - ChemSpider