The chemical structure of a disaccharide (having molecular formula C12H22O11 ) is studied by NMR spectroscopy. In particular, by the interpretation of 1D proton and carbon, DEPT, COSY, and HSQC experiments, two sugar subunits have been determined and assigned as reported below. 5pts Using the HMBC experiment (1H500MHz,13C125MHz;D2O) reported below, can you determine how the two subunits are bonded together? Make sure to draw the structure and show your work graphically on your structure by curved arrows. Please note that one of the oxygen atoms is actually shared by the two subunits. Furthermore, in agreement with the molecular formula, the valences of the oxygen atoms not used to join the two units must be saturated by hydrogens. The chemical structure of a disaccharide (having molecular formula C12H22O11 ) is studied by NMR spectroscopy. In particular, by the interpretation of 1D proton and carbon, DEPT, COSY, and HSQC experiments, two sugar subunits have been determined and assigned as reported below. 5pts Using the HMBC experiment (1H500MHz,13C125MHz;D2O) reported below, can you determine how the two subunits are bonded together? Make sure to draw the structure and show your work graphically on your structure by curved arrows. Please note that one of the oxygen atoms is actually shared by the two subunits. Furthermore, in agreement with the molecular formula, the valences of the oxygen atoms not used to join the two units must be saturated by hydrogens