number atom shift 1 P 0.895 10 N 159.624 11 N 164.657 12 C 70.630 13 C 15.357 14 C 102.056 15 C 94.834 16 C 78.394 17 C 42.289 18 C 156.365 19 C 168.822 20 C 116.845 21 C 147.412 22 H 3.909 23 H 3.675 24 H 0.799 25 H 7.220 26 H 5.003 27 H 5.548 28 H 3.244 29 H 3.267 30 H 2.389 31 H 6.005 32 H 5.234 33 H 5.980 34 H 3.641 35 H 3.722 36 H 7.913