IUPAC Name: (3Z)-3-[ethoxy(hydroxy)methylidene]-6-methyl-1H-pyridine-2,4-dione 
Empirical Formula: C₉H₁₁NO₄
Molecular Weight: 197.1879g/mol
Structure of 3-Pyridinecarboxylicacid, 2,4-dihydroxy-6-methyl-, ethyl ester (CAS NO.70254-52-3):

Index of Refraction: 1.545
Molar Refractivity: 47.615 cm³
Molar Volume: 150.647 cm³
Polarizability: 18.876×10^-24cm³
Surface Tension: 50.137 dyne/cm
Density: 1.309 g/cm³
Flash Point: 173.296 °C
Enthalpy of Vaporization: 70.481 kJ/mol
Boiling Point: 362.933 °C at 760 mmHg
Vapour Pressure: 0 mmHg at 25°C 
Product Categories: blocks;Carboxes;Pyridines;Esters;Pyridine 
Systematic Name: ethyl 4-hydroxy-6-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate
SMILES: O=C(OCC)\C1=C(/O)\C=C(\C)NC1=O
InChI: InChI=1/C9H11NO4/c1-3-14-9(13)7-6(11)4-5(2)10-8(7)12/h4H,3H2,1-2H3,(H2,10,11,12)
InChIKey: CMCZAWPDHHYFPU-UHFFFAOYAU

Hazard Codes: Xi
Hazard Note: Irritant
HazardClass: IRRITANT

  3-Pyridinecarboxylicacid, 2,4-dihydroxy-6-methyl-, ethyl ester , its cas register number is 70254-52-3. It also can be called 3-Pyridinecarboxylic acid, 1,2-dihydro-4-hydroxy-6-methyl-2-oxo-, ethyl ester ; Ethyl 2,4-dihydroxy-6-methylnicotinate ; Ethyl 2,4-dihydroxy-6-methylpyridine-3-carboxylate ; Ethyl 4-hydroxy-6-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate ; 2,4-Dihydroxy-6-methyl-3-pyridine carboxylic acid ethyl ester ; 2,4-Dihydroxy-6-methylnicotinic acid ethyl ester .