number atom shift 2 N 101.620 3 N 350.621 4 C 166.222 5 C 129.599 6 C 148.708 7 C 154.628 8 C 136.658 9 C 124.445 10 H 5.242 11 H 6.329 12 H 10.395 13 H 10.314 14 H 9.760 15 H 8.798