64196-68-5
acetic acid 4-hydroxybut-2-enyl ester
→
~94%
38982-39-7
4-oxobut-2-enyl acetate
27977-16-8
acetic acid,but-2-ene-1,4-diol
~64%
57204-61-2
4-diazo-but-2t-enal
+
64-19-7
乙酸
38982-35-3
16548-28-0