2-R-5-氧四氢呋喃－2－羧酰氯

(1′R,5R)-5-(1′,2′-dihydroxyethyl)dihydrofuran-2(3H)-one

(5R)-5-((S)-[((R)-2,2-dimethyl-1,3-dioxolan-4-yl)hydroxymethyl])-5H-furan-2-one

(S)-(+)-5-氧代-2-四氢呋喃羧酸

(R)-(-)-5-氧代-2-四氢呋喃羧酸