number atom shift 1 C 19.965 2 C 140.031 3 C 63.786 4 C 207.315 5 C 156.814 6 C 130.272 7 C 121.534 8 C 158.711 9 N 379.771 13 H 3.583 14 H 3.985 15 H 3.947 16 H 9.636 17 H 5.746 18 H 6.317 19 H 12.251 20 H 0.646 21 H 14.198