number atom shift 1 P 6.666 11 N 161.652 12 N 166.953 13 N 215.217 14 N 385.527 15 C 76.550 16 C 82.296 17 C 83.133 18 C 74.681 19 C 55.393 20 C 23.571 21 C 21.493 22 C 159.182 23 C 154.013 24 C 166.027 25 C 147.617 26 C 138.174 27 C 142.258 28 C 155.597 29 C 142.143 30 C 125.899 31 C 142.975 32 H 3.793 33 H 3.805 34 H 5.263 35 H 2.666 36 H 4.015 37 H 7.793 38 H 4.487 39 H 4.900 40 H 4.968 41 H 5.300 42 H 5.942 43 H 6.520 44 H 5.183 45 H 3.672 46 H 3.519 47 H 3.659 48 H 3.582 49 H 3.432 50 H 3.551 51 H 9.385 52 H 9.236