摘要:Starting from 3-oxo-11-epi-eusantona-4, 6-dienic acid (IV ; R=H) and 3-oxoeu-santona-4, 6-dienic acid (VIII ; R=H), α-(5, 6-dihydroxy-4, 9-dimethyl-3-oxo-3, 5, 6, 7, 8, 9-hexahydronaphthyl-6)propionic acid lactones-A and -B (Xa and Xb) were synthesized, which would probably be racemic stereoisomers of artemisin.