atom_id atom_symbol chemical_shift multiplet coupling_constant 51 H 3.91 s NA 52 H 3.91 s NA 53 H 3.91 s NA 54 H 7.05 d 8.8 55 H 7.89 d 8.8 56 H 6.61 s NA 57 H 2.15 br s NA 58 H 2.15 br s NA 59 H 2.15 br s NA 60 H 3.84 br s NA 61 H 3.84 br s NA 62 H 3.84 br s NA 63 H 6.73 s NA 64 H 2.49 s NA 65 H 2.49 s NA 66 H 2.49 s NA 67 H 6.50 s NA 68 H 7.45 br d 8 69 H 6.84 d 8.8 70 H 3.78 s NA 71 H 3.78 s NA 72 H 3.78 s NA 73 H 6.84 d 8.8 74 H 7.45 br d 8 75 H 3.82 br s NA 76 H 3.82 br s NA 77 H 3.82 br s NA 78 H 7.03 s NA 79 H 7.89 d 8.8 80 H 7.05 d 8.8