2-ethyl-2-((methylthio)methoxy)butyl 4-oxopentanoate

(R)-4-Hydroxy-5-(4-oxo-pentanoyloxy)-pentanoic acid methyl ester

methyl (R)-4-((ethylthio)methoxy)-5-((4-oxopentanoyl)oxy)pentanoate

当归内酯

5-氧代己酸