number atom shift 8 C 53.462 9 C 36.515 10 C 169.419 11 C 172.700 12 C 161.869 13 C 201.399 14 H 6.605 15 H 6.900 16 H 10.726 17 H 4.297 18 H 3.360 19 H 5.780