(5S)-5-(2-hydroxy-4,5-methylenedioxyphenyl)-1,2-O-isopropylidene-3-O-methyl-α-D-xylofuranose 、 Magnesium;1,3-benzodioxol-5-olate;bromide 生成 7-[[(3aR,5R,6S,6aR)-6-methoxy-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]-(6-hydroxy-1,3-benzodioxol-5-yl)methyl]-1,3-benzodioxol-5-ol