(S)-(+)-5-氧代-2-四氢呋喃羧酸

2-Bromo-2-deoxy-D-arabinono-γ-lactone

(2S)-2-(trityloxymethyl)-2H-furan-5-one

谷氨酸

2-bromo-2-deoxy-D-xylono-1,4-lactone