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  1. 4-Pentenoic acid - NIST Chemistry WebBook

  2. 4-Pentenoic acid 97 591-80-0 - MilliporeSigma

  3. 4-Pentynoic acid 95 6089-09-4 - MilliporeSigma

  4. 4-Pentenoic acid = 98 , stabilized, FG 591-80-0 - MilliporeSigma

  5. 4-Pentynoic acid | C5H6O2 | CID 22464 - PubChem

  6. Pentenoic acid - Wikipedia

  7. 4-Pentenoic acid - NIST Chemistry WebBook

  8. 4-Pentenoic acid | C5H8O2 | CID 61138 - PubChem

  9. 4-Pentynoic acid - NIST Chemistry WebBook

  10. 4-Pentynoic acid, 95%, Thermo Scientific Chemicals

  11. 某些结果已被删除