atom_id	symbol	chemical_shift	mult	coupling
18	H	2.1	s	NA
19	H	2.1	s	NA
20	H	2.1	s	NA
21	H	1.86	s	NA
22	H	1.86	s	NA
23	H	1.86	s	NA
24	H	6.03	s	NA
25	H	2.69	dd	6.8,15.4
26	H	2.61	dd	7.7,15.4
27	H	3.23	m	NA
28	H	1.22	d	6.9
29	H	1.22	d	6.9
30	H	1.22	d	6.9
31	H	6.92	 br d	8.1
32	H	6.68	d	8.1
33	H	5.01	 br s	NA
34	H	2.22	s	NA
35	H	2.22	s	NA
36	H	2.22	s	NA
37	H	6.96	 br s	NA
