chemical_shift intensity peak_position_ppm 21.15 1.0 21.15 37.97 1.0 37.97 33.37 1.0 33.37 17.97 1.0 17.97 40.69 1.0 40.69 38.79 1.0 38.79 29.07 1.0 29.07 45.34 1.0 45.34 71.74 1.0 71.74 73.67 1.0 73.67 122.13 1.0 122.13 149.94 1.0 149.94