(R)-2,2-二甲基-1,3-二氧戊环-4-丙醇

5-(甲氧基)2-(5H)-二氧三环酮

(3R,3AS,6AR)-六氢呋喃并[2,3-B]呋喃-3-醇

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

(3aS,4R,6aR)-四氢-4-甲氧基呋喃并[3,4-b]呋喃-2(3H)-酮