152126-79-9
ethyl 3,4-dioxo-2-triphenylphosphoranylidenepentanoate
→
~22%
54966-49-3
ethyl 4-oxopent-2-ynoate
+
791-28-6
三苯基氧化膦
75-36-5
乙酰氯
623-47-2
丙炔酸乙酯
~9%
58109-10-7
ethyl 3-propiolate silver salt