number atom shift 1 C 37.133 2 C 124.597 3 C 134.252 4 C 151.384 5 C 152.236 6 C 21.527 7 C 35.793 8 C 54.866 9 C 140.037 10 C 67.876 11 N 351.723 12 N 64.625 13 H 3.412 14 H 3.446 15 H 2.393 16 H 8.661 17 H 9.522 18 H 10.114 19 H 9.977 20 H 2.646 21 H 3.221 22 H 3.200 23 H 2.853 24 H 4.107 25 H 3.139 26 H 3.744