number atom shift 1 P 4.122 8 N 389.620 9 C 167.775 10 C 156.686 11 C 129.126 12 C 126.981 13 C 132.989 14 C 133.085 15 H 4.481 16 H 4.076 17 H 8.644 18 H 9.375 19 H 9.778 20 H 9.677