number atom shift 1 C 131.825 2 C 130.885 3 C 129.499 4 C 131.689 5 C 132.788 6 C 64.510 7 C 68.918 8 C 122.692 9 C 130.485 10 C 78.321 11 C 76.927 12 C 70.185 13 C 70.553 14 C 76.827 15 C 76.373 16 C 74.558 17 C 73.976 18 C 104.492 19 C 98.476 20 C 67.315 21 N 300.586 33 H 8.790 34 H 8.835 35 H 8.755 36 H 9.283 37 H 8.832 38 H 4.921 39 H 5.298 40 H 4.589 41 H 5.915 42 H 4.526 43 H 4.585 44 H 4.326 45 H 4.382 46 H 4.420 47 H 4.232 48 H 4.305 49 H 4.342 50 H 5.056 51 H 4.729 52 H 6.723 53 H -0.090 54 H 2.189 55 H 2.125 56 H 2.120 57 H 2.137 58 H 1.673 59 H 1.504