number atom shift 6 N 115.405 7 C 39.760 8 C 75.926 9 C 69.313 10 C 36.797 11 C 32.163 12 C 18.342 13 C 14.887 14 C 171.110 15 C 176.377 16 H 3.690 17 H 0.233 18 H 6.485 19 H 5.462 20 H 4.212 21 H 4.335 22 H 5.149 23 H 4.290 24 H 4.740 25 H 3.050 26 H 4.265 27 H 2.210 28 H 1.408 29 H 3.233 30 H 1.511 31 H 2.692 32 H 1.007