Sodium (S)-4-((3aR,5R,6S,6aR)-2,2-dimethyl-6-(((2-(trimethylsilyl)ethoxy)carbonyl)oxy)tetrahydrofuro[2,3-d][1,3]dioxol-5-yl)-4-hydroxy-2-oxobutanoate 生成 (3aR,3bS,7S,7aR,8aR)-5,7-Dihydroxy-2,2-dimethylhexahydro-3aH-[1,3]dioxolo[4',5':4,5]furo[3,2-b]pyran-5-carboxylic acid