number atom shift 2 C 158.875 3 C 116.248 4 C 113.863 5 C 130.904 6 C 129.901 7 C 120.054 8 H 4.421 9 H 8.127 10 H 7.449 11 H 8.524 12 H 8.398 13 H 8.114