5-氧代己酸

ethyl 5-acetoxyhexanoate

(5R,E)-methyl 5-((tetrahydro-2H-pyran-2-yl)oxy)hex-2-enoate

3,5-二酮己酸甲酯

(6R,12R,18R)-(-)-6,12,18-trimethyl-1,7,3-trioxacyclooctadecane-2,8,14-trione