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  1. Butyne - Wikipedia

  2. 1-Butyne - Wikipedia

  3. 1-Butyne | C4H6 | CID 7846 - PubChem

  4. 1-Butyne - NIST Chemistry WebBook

  5. Structure of 1-BUTYNE (C4H6) - Mol-Instincts

  6. 1-Butyne vs. 2-Butyne: What's the Difference?

  7. But-1-yne | C4H6 - ChemSpider

  8. Difference Between 1 Butyne and 2 Butyne | Definition, …

  9. 1-Butyne - Wikiwand

  10. Butyne Definition & Meaning - Merriam-Webster