atom_id atom_symbol chemical_shift multiplet coupling_constant 15 H 0.99 d 6.8 16 H 0.99 d 6.8 17 H 0.99 d 6.8 18 H 1.90 m NA 19 H 1.46 m NA 20 H 1.39 m NA 21 H 1.59 m NA 22 H 1.55 m NA 23 H 1.24 m NA 24 H 1.66 dd 13.2,4.4 25 H 1.01 s NA 26 H 1.01 s NA 27 H 1.01 s NA 28 H 1.98 dd 17.2,1.2 29 H 2.89 d 17.2 30 H 5.91 dd 10.4,1.2 31 H 6.81 d 10.0 32 H NA NA NA