number atom shift 1 C 30.382 2 C 54.304 3 C 182.072 4 C 172.695 5 N 72.023 6 N 234.529 7 N 82.574 9 H 4.104 10 H 3.872 11 H 3.767 12 H 4.698 13 H 4.350 14 H 4.807 15 H 4.135