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  1. 1-Butyne - Wikipedia

  2. 1-Butyne | C4H6 | CID 7846 - PubChem

  3. Butyne | Formula, Properties & Application

  4. But-1-yne | C4H6 - ChemSpider

  5. Butyne - Wikipedia

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

  7. Structural Formula - Purdue University

  8. 1-Butyne - NIST Chemistry WebBook

  9. 3.7: Alkynes - Chemistry LibreTexts

  10. 2-Butyne | C4H6 | CID 10419 - PubChem