(CH₃)₃SiCH₂CO₂CH₂CH₃ CAS#: 4071-88-9 F.W.: 160.29

CH₃CH₂C≡CCOOC₂H₅ CAS#: 55314-57-3 F.W.: 126.16

HC≡CCOOC₂H₅ CAS#: 623-47-2 F.W.: 98.10

HC≡COCH₂CH₃ CAS#: 927-80-0 F.W.: 70.09 WARNING: Reported to undergo explosive decomposition if heated above its boiling point to 100°C. Requires refrigeration.