94691-90-4
1,5-dioxaspiro[5.5]undec-2-en-4-one
→
134878-53-8
3-Fluoro-1,5-dioxaspiro[5.5]undec-3-en-2-one
134878-52-7
cis-5,6-difluoro-4-oxo-1,3-dioxine-2-spirocyclohexane