54109-54-5
ethyl 2-methylidenepent-4-ynoate
+
123-54-6
乙酰丙酮
→
~60%
96540-52-2
ethyl 4-acetyl-5-oxo-2-prop-2-ynylhexanoate
26199-74-6
ethyl 2-diethoxyphosphorylpent-4-ynoate