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  1. Structure of 1-BUTENE (C4H8) - Mol-Instincts

  2. 1-butene Formula & Structure - Purdue University

  3. Butene - Purdue University

  4. 1-Butene | C4H8 | CID 7844 - PubChem

  5. 1-Butene - NIST Chemistry WebBook

  6. 3.4. Isomers | Organic Chemistry 1: An open textbook - Lumen …

  7. 1-Butene | C4H8 - ChemSpider

  8. 1-Butene - NIST Chemistry WebBook

  9. 1-Butene - Wikipedia

  10. Butene Overview, Formula & Structure - Lesson | Study.com