number	atom	shift
1	C	39.533
2	C	37.308
3	C	176.465
4	C	183.128
5	C	182.676
6	C	79.063
14	H	4.127
15	H	3.292
16	H	4.262
17	H	5.557
18	H	6.778
19	H	6.864
20	H	6.665
21	H	4.851