nr	azo		oh-azo		nh2-azo
1	2.5362		2.6057		2.6189
2	3.7595		3.5575		3.3929
3	4.1024		4.1567		4.1968
4	4.1027		4.3053		4.2805
5	4.8074		4.6329		4.5275