atom_id	symbol	chemical_shift	mult	coupling
21	H	3.7	s	NA
22	H	3.7	s	NA
23	H	3.7	s	NA
24	H	9.21	s	NA
25	H	6.22	s	NA
26	H	14.58	s	NA
27	H	8.29	dd	8.0,1.5
28	H	7.31	m	NA
29	H	7.8	m	NA
30	H	7.69	dd	8.5,1.5
31	H	4.1	s	NA
32	H	4.1	s	NA
33	H	4.1	s	NA
