number atom shift 1 C 120.798 2 C 122.822 3 C 122.009 4 C 109.903 5 C 103.534 6 C 123.472 7 C 126.032 8 C 132.900 9 N 136.153 10 H 8.326 11 H 8.339 12 H 8.747 13 H 8.219 14 H 7.731 15 H 8.079 16 H 7.718