number atom shift 1 P -2.629 2 P 1.405 3 P 6.080 19 N 157.602 20 N 166.107 21 C 70.498 22 C 105.066 23 C 85.318 24 C 73.810 25 C 73.752 26 C 150.135 27 C 159.665 28 C 145.010 29 C 103.506 30 H 7.747 31 H 7.371 32 H 4.736 33 H 6.862 34 H 3.589 35 H 0.988 36 H 7.235 37 H 5.742 38 H 5.752 39 H 6.063 40 H 5.432 41 H 4.915 42 H 5.781 43 H 8.367 44 H 6.825