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Solutions for Carbohydrates and Nucleic Acids OCH3OH2C H OCH3 H H CH3O CH2OCH3 OCH3 AcO AcO OAc H AcO O H H H H OAc OHH OHH CHO HHO OHH CH2OH CH2OH H OH HO H CHO HO H H OH PhNHNH2 H+ OHH C O CH2OH HHO OHH CH2OH NNHPhC CH2OH H OH HO H C NNHPh H OH H O CH3O OCH3 OCH3 H O H H H CH3O H CH3 H OAc HH OAcAcO H AcOH2C O(b)(a) 31 Excess acetic anyhydride is needed to acetylate all OH groups. (b)(a) 30 Excess CH I is needed to form methyl ethers at all OH groups.3 D-fructoseD-mannoseD-glucose (a) The part of each structure in the box is common to all three monosaccharides. 32 607