75988-64-6
→
~5%
75988-63-5
1,4-dioxaspiro[4.4]non-8-en-7-amine
75988-55-5
7-bromo-1,4-dioxaspiro[4.4]non-8-ene
695-56-7
2-环戊烯-1-酮缩乙醛