(2,5-diacetyloxy-6-oxo-7-oxabicyclo[3.2.1]octan-3-yl) acetate

莽草酸

五氯丙酮

(1alpha,3R,4alpha,5R)-3,5-二[[(1,1-二甲基乙基)二甲基硅烷基]氧基]-1,4-二羟基-环己烷羧酸甲酯

(-)-3-去氢莽草酸