2a) Label the protons in each highlighted CH2 group as homotopic, enantiotopic, or diastereotopic. Structure: Homotopic, Enantiotopic, or Diastereotopic? b) There is one structure in Question 1 that contains diastereotopic protons, leading to a higher number of signals than you originally may have expected. Circle the structure and revise (if necessary) the number of 1H signals you expect that structure to exhibit