methyl (E)-5-hydroxy-6-(2-methyl-1,3-dioxolan-2-yl)hex-2-enoate

(E)-methyl 6-(2-methyl-1,3-dioxolan-2-yl)-5-((methylsulfonyl)oxy)hex-2-enoate

methyl 7-oxo-octanoate

7-羰基辛酸

5-溴戊酸甲酯