Molecular structure of 2,6-Dichloro-4-nitropyridine N-oxide (CAS NO.2587-01-1) is:

Product Name: 2,6-Dichloro-4-nitropyridine N-oxide
CAS Registry Number: 2587-01-1
IUPAC Name: 2,6-Dichloro-4-nitro-1-oxidopyridin-1-ium
Molecular Weight: 208.98698 [g/mol]  
Molecular Formula: C₅H₂Cl₂N₂O₃  
XLogP3-AA: 1.6  
H-Bond Donor: 0  
H-Bond Acceptor: 3
Melting Point: 176-180 °C
Index of Refraction: 1.653 
Molar Refractivity: 42.7 cm³ 
Molar Volume: 116.5 cm³  
Surface Tension: 68.6 dyne/cm 
Density: 1.79 g/cm³ 
Flash Point: 205.1 °C 
Enthalpy of Vaporization: 64.27 kJ/mol 
Boiling Point: 415.6 °C at 760 mmHg 
Vapour Pressure: 9.84E-07 mmHg at 25 °C 
Product Categories: Pyridine;C5Heterocyclic Building Blocks;Halogenated Heterocycles;Heterocyclic Building Blocks;Pyridines
Canonical SMILES: C1=C(C=C([N+](=C1Cl)[O-])Cl)[N+](=O)[O-]
InChI: InChI=1S/C5H2Cl2N2O3/c6-4-1-3(9(11)12)2-5(7)8(4)10/h1-2H
InChIKey: LWOLKOLHQCMQDE-UHFFFAOYSA-N

Safty information about 2,6-Dichloro-4-nitropyridine N-oxide (CAS NO.2587-01-1) is:
Hazard Codes: Xn
Risk Statements: 22-37/38-41 
R22:Harmful if swallowed. 
R37/38:Irritating to respiratory system and skin. 
R41:Risk of serious damage to the eyes.
Safety Statements: 26-36/37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.

 2,6-Dichloro-4-nitropyridine N-oxide , its cas register number is 2587-01-1. It also can be called 2,6-Dichloro-4-nitropyridine-1-oxide ; Pyridine,2,6-dichloro-4-nitro-, 1-oxide .