(E)-3-[(2S,3R)-3-((2R,3R,4R,5R)-3,4-Dihydroxy-2,4,5-trimethyl-tetrahydro-furan-2-yl)-2,3-dimethyl-oxiranyl]-acrylic acid ethyl ester 生成
(E)-(S)-4-((1S,3R,4S,6R,7R)-7-Acetoxy-1,4,6-trimethyl-2,5-dioxa-bicyclo[2.2.1]hept-3-yl)-4-hydroxy-pent-2-enoic acid methyl ester