基本信息：

Name:(E)-6-((2,4-dihydroxyphenyl)diazenyl)nicotinic acid

Chemical Formula: C12H9N3O4
Molecular Weight: 259.2210
m/z: 259.0593 (100.0%), 260.0627 (13.0%), 260.0563 (1.1%)
Elemental Analysis: C, 55.60; H, 3.50; N, 16.21; O, 24.69