number atom shift 1 C 99.721 4 C 72.249 5 C 71.238 6 C 66.903 7 C 68.603 9 C 66.993 10 C 61.098 11 C 76.340 15 C 70.187 17 C 76.163 19 C 100.661 20 C 74.701 24 H 5.480 25 H 4.551 26 H 4.861 27 H 4.580 28 H 5.049 29 H 4.941 30 H 0.482 31 H 4.521 32 H 4.639 33 H 5.425 34 H 4.636 35 H 2.396 36 H 2.475 37 H 1.211 38 H 4.353 39 H 4.367 40 H 2.151 41 H 5.345 42 H 4.224 43 H 2.169 44 H 2.193 45 H 1.612