4-[hydroxy-(4-hydroxy-3-methoxy-phenyl)-methyl]-2-(4-hydroxy-3-methoxy-phenyl)-3-hydroxymethyl-tetrahydro-furan 生成 2-(3-Methoxy-4-trimethylsilanyloxy-phenyl)-4-[(3-methoxy-4-trimethylsilanyloxy-phenyl)-trimethylsilanyloxy-methyl]-3-trimethylsilanyloxymethyl-tetrahydro-furan