number	atom	shift
1	C	130.555
2	C	130.549
3	C	30.339
4	C	126.433
5	C	54.835
6	C	182.171
7	N	36.146
8	N	169.337
9	N	296.302
12	H	9.285
13	H	8.416
14	H	3.705
15	H	3.865
16	H	4.462
17	H	1.659
18	H	2.025
19	H	8.591
20	H	6.494