number	atom	shift
4	N	35.261
5	C	56.373
6	C	29.185
7	C	30.234
8	C	11.650
9	C	177.994
10	H	6.378
11	H	1.318
12	H	1.626
13	H	3.612
14	H	3.281
15	H	4.428
16	H	2.341
17	H	2.679
18	H	3.086
19	H	3.000
20	H	2.504