Molecule structure of Furo[3,4-b]pyridine-5,7-dione (CAS NO.699-98-9):

IUPAC Name: Furo[3,4-b]pyridine-5,7-dione 
Molecular Weight: 149.10362 g/mol
Molecular Formula: C₇H₃NO₃
Density: 1.556 g/cm³
Melting Point: 137-139 °C(lit.) 
Boiling Point: 334.6 °C at 760 mmHg 
Flash Point: 156.2 °C
Index of Refraction: 1.622
Molar Refractivity: 33.77 cm³
Molar Volume: 95.7 cm³
Surface Tension: 71.6 dyne/cm
Enthalpy of Vaporization: 57.76 kJ/mol
Vapour Pressure: 0.000127 mmHg at 25 °C 
Sensitive Moisture: sensitive
XLogP3-AA: 0.6
H-Bond Acceptor: 4
Exact Mass: 149.011293
MonoIsotopic Mass: 149.011293
Topological Polar Surface Area: 56.3
Heavy Atom Count: 11
Canonical SMILES: C1=CC2=C(C(=O)OC2=O)N=C1
InChI: InChI=1S/C7H3NO3/c9-6-4-2-1-3-8-5(4)7(10)11-6/h1-3H
InChIKey: MCQOWYALZVKMAR-UHFFFAOYSA-N
EINECS: 211-834-1
Product Categories: pyridine derivative

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S37/39:Wear suitable gloves and eye/face protection.
WGK Germany: 3
F: 10-21

 Furo[3,4-b]pyridine-5,7-dione (CAS NO.699-98-9) is also named as 2,3-Pyridinedicarboxylic anhydride ; NSC 44309 ;
Pyridine-2,3-dicarboxylic anhydride . Furo[3,4-b]pyridine-5,7-dione (CAS NO.699-98-9) is white crystal powder.