atom_id symbol chemical_shift mult coupling 15 H 0.87 d 6.6 16 H 0.87 d 6.6 17 H 0.87 d 6.6 18 H 2.18 m NA 19 H 4.2 dd 10.8,11.4 20 H 3.82 br d 10.8 21 H 2.87 d 10.8 22 H 2.81 m NA 23 H 1.63 dd 12.6,7.2 24 H 2.06 ddd 12.6,7.8,3.6 25 H 3.82 br s NA 26 H NA NA NA 27 H 1.49 s NA 28 H 1.49 s NA 29 H 1.49 s NA 30 H NA NA NA