Structure based on 1ftl

Ideal structure
Name: 6,7-dinitroquinoxaline-2,3-dione
Formula: C8 H2 N4 O6
Weight: 250.125
SMILES: "[O-][N+](=O)C1=CC2=NC(=O)C(=O)N=C2C=C1[N+]([O-])=O"
Spacial conformation based on PDB 1ftl.
Also present on 1lb9, 4l17, 8fwu, 8opy
RESIDUE   DNQ     20
CONECT      O1     1 C1  
CONECT      O2     1 C2  
CONECT      C1     3 O1   C2   N1  
CONECT      C2     3 O2   C1   N2  
CONECT      N1     2 C1   C3  
CONECT      N2     2 C2   C4  
CONECT      C3     3 N1   C4   C5  
CONECT      C4     3 N2   C3   C6  
CONECT      C5     3 C3   C7   H51 
CONECT      C6     3 C4   C8   H61 
CONECT      C7     3 C5   C8   N3  
CONECT      C8     3 C6   C7   N4  
CONECT      N3     3 C7   O3   O5  
CONECT      N4     3 C8   O4   O6  
CONECT      O3     1 N3  
CONECT      O4     1 N4  
CONECT      O5     1 N3  
CONECT      O6     1 N4  
CONECT      H51    1 C5  
CONECT      H61    1 C6  
END   
HET    DNQ             20
HETSYN     DNQ DNQX
HETNAM     DNQ 6,7-DINITROQUINOXALINE-2,3-DIONE
FORMUL      DNQ    C8 H2 N4 O6

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uses Jmol, developed by the Jmol Development Team (color reference)
OCA© by Jaime Prilusky, 1996-2004,2006,2010,2014
Bioinformatics Unit
Weizmann Institute of Science