number	atom	shift
2	N	53.924
3	C	58.874
4	C	70.694
5	C	61.327
6	C	55.307
7	C	55.307
8	H	1.385
9	H	5.280
10	H	5.280
11	H	4.438
12	H	4.438
13	H	4.453
14	H	4.453
15	H	4.209
16	H	4.227
17	H	4.362
18	H	4.227
19	H	4.209
20	H	4.362
21	H	4.313