atom_id atom_symbol chemical_shift multiplet coupling_constant 19 H 8.36 br s NA 20 H 6.81 d 8.8 21 H 7.22 d 8.8 22 H 4.90 dd 10.4,2.4 23 H 2.05 m NA 24 H 2.05 m NA 25 H 2.84 m NA 26 H 2.65 ddd 12.0,5.2,3.2 27 H 6.83 d 8.0 28 H 6.33 dd 8.0,2.4 29 H 8.11 br s NA 30 H 6.28 d 2.4 31 H 7.22 d 8.8 32 H 6.81 d 8.8