Molecular Structure of 2,6-Dihydroxynicolinic acid (CAS NO.10357-91-2):

Systematic Name: 2-Hydroxy-6-oxo-1,6-dihydropyridine-3-carboxylic acid 
Molecular Formula: C₆H₅NO₄
Molecular Weight: 155.11 
H bond acceptors: 5
H bond donors: 3
Freely Rotating Bonds: 2 
Nominal Mass: 155
Average Mass: 155.1082 
Monoisotopic Mass: 155.021858
Index of Refraction: 1.657
Molar Refractivity: 33.43 cm³
Molar Volume: 90.7 cm³
Surface Tension: 91.8 dyne/cm
Density: 1.708 g/cm³
Flash Point: 180.4 °C
Enthalpy of Vaporization: 71.97 kJ/mol
Boiling Point: 374.6 °C at 760 mmHg
Vapour Pressure: 3.82E-07 mmHg at 25 °C
SMILES: O=C(O)C=1/C=C\C(=O)NC=1O
InChI: InChI=1/C6H5NO4/c8-4-2-1-3(6(10)11)5(9)7-4/h1-2H,(H,10,11)(H2,7,8,9)
InChIKey: IGCZQNUHGOYVJI-UHFFFAOYAG

 2,6-Dihydroxynicolinic acid (CAS NO.10357-91-2), its Synonyms are 3-Pyridinecarboxylicacid, 1,2-dihydro-6-hydroxy-2-oxo- ; Nicotinicacid, 2,6-dihydroxy- (7CI) ; 1,2-Dihydro-6-hydroxy-2-oxo-3-pyridinecarboxylic acid ; 2,6-Dihydroxynicotinic acid .