1,6-Bis-(triphenyl-λ5-phosphanylidene)-hexane-2,5-dione

5-甲基四氢吡喃-2-酮

3-methyl-4-trimethylsilylpent-4-enoic acid

4-phenylcyclopent-2-en-1-one

diethyl ((2-hydroxy-5-methyltetrahydrofuran-2-yl)methyl)phosphonate