Structure based on 1u4s

Ideal structure
Name: naphthalene-2,6-disulfonic acid
Formula: C10 H8 O6 S2
Weight: 288.297
SMILES: "O[S](=O)(=O)c1ccc2cc(ccc2c1)[S](O)(=O)=O"
Spacial conformation based on PDB 1u4s.
Also present on 3gkn, 7k5v
RESIDUE   BIH     26
CONECT      O31    1 S3  
CONECT      S3     4 O31  O32  O3   C2  
CONECT      O32    1 S3  
CONECT      O3     2 S3   HO3 
CONECT      C2     3 S3   C1   C4  
CONECT      C1     3 C2   C    H1  
CONECT      C      3 C1   C8A  H   
CONECT      C8A    3 C    C5   C4A 
CONECT      C5     3 C8A  C7   H5  
CONECT      C4A    3 C8A  C4   C9  
CONECT      C4     3 C2   C4A  H4  
CONECT      C9     3 C4A  C8   H9  
CONECT      C8     3 C9   C7   H8  
CONECT      C7     3 C5   C8   S6  
CONECT      S6     4 C7   O6   O61  O1  
CONECT      O6     2 S6   HO6 
CONECT      O61    1 S6  
CONECT      O1     1 S6  
CONECT      HO3    1 O3  
CONECT      H1     1 C1  
CONECT      H      1 C   
CONECT      H5     1 C5  
CONECT      H4     1 C4  
CONECT      H9     1 C9  
CONECT      H8     1 C8  
CONECT      HO6    1 O6  
END   
HET    BIH             26
HETSYN     BIH 2,6-NAPHTHALENEDISULFONIC ACID; 2,6-NAPHTHALENEDISULPHO
HETSYN   2 BIH NIC ACID
HETNAM     BIH NAPHTHALENE-2,6-DISULFONIC ACID
FORMUL      BIH    C10 H8 O6 S2

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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