atom_id symbol chemical_shift mult coupling 15 H 1.09 d 7.6 16 H 1.09 d 7.6 17 H 1.09 d 7.6 18 H 1.98 m NA 19 H 2.08 m NA 20 H 1.45 m NA 21 H 1.74 m NA 22 H 1.5 m NA 23 H 1.18 d 12.8 24 H 1.9 m NA 25 H 1.13 s NA 26 H 1.13 s NA 27 H 1.13 s NA 28 H 1.93 d 16.4 29 H 2.92 d 16.4 30 H 5.98 d 10.0 31 H 6.76 d 10.0 32 H NA NA NA