Structure based on 1u4l

Ideal structure
Name: heparin disaccharide i-s
Formula: C12 H15 N O19 S3
Weight: 573.438
SMILES: "O[CH]1O[CH](CO[S]([O-])(=O)=O)[CH](O[CH]2OC(=C[CH](O)[CH]2O[S]([O-])(=O)=O)C([O-])=O)[CH](O)[CH]1N[S]([O-])(=O)=O"
Spacial conformation based on PDB 1u4l.
Also present in other 6 PDB entries.
RESIDUE   H1S     50
CONECT      C10    4 C8   O15  O5   H10 
CONECT      C8     4 C10  C4   N14  H8  
CONECT      C4     4 C8   C1   O9   H4  
CONECT      C1     4 C4   C2   O3   H1  
CONECT      C2     4 C1   C6   O5   H2  
CONECT      C6     4 C2   O11  H61  H62 
CONECT      N14    3 C8   S20  H14 
CONECT      O15    2 C10  H15 
CONECT      O9     2 C4   HO9 
CONECT      O3     2 C1   C7  
CONECT      O5     2 C10  C2  
CONECT      O11    2 C6   S16 
CONECT      S20    4 N14  O28  O29  O30 
CONECT      O28    1 S20 
CONECT      O29    1 S20 
CONECT      O30    1 S20 
CONECT      S16    4 O11  O21  O22  O23 
CONECT      O21    1 S16 
CONECT      O22    1 S16 
CONECT      O23    1 S16 
CONECT      S26    4 O18  O31  O32  O33 
CONECT      C7     4 O3   C12  O13  H7  
CONECT      C12    4 C7   O18  C17  H12 
CONECT      O18    2 S26  C12 
CONECT      C17    4 C12  O25  C24  H17 
CONECT      O25    2 C17  H25 
CONECT      C24    3 C17  C19  H24 
CONECT      C19    3 C24  O13  C27 
CONECT      O13    2 C7   C19 
CONECT      C27    3 C19  O34  O35 
CONECT      O31    1 S26 
CONECT      O32    1 S26 
CONECT      O33    1 S26 
CONECT      O34    1 C27 
CONECT      O35    1 C27 
CONECT      H10    1 C10 
CONECT      H8     1 C8  
CONECT      H4     1 C4  
CONECT      H1     1 C1  
CONECT      H2     1 C2  
CONECT      H61    1 C6  
CONECT      H62    1 C6  
CONECT      H14    1 N14 
CONECT      H15    1 O15 
CONECT      HO9    1 O9  
CONECT      H7     1 C7  
CONECT      H12    1 C12 
CONECT      H17    1 C17 
CONECT      H25    1 O25 
CONECT      H24    1 C24 
HET    H1S             50
FORMUL      H1S    C12 H15 N1 O19 S3 4-

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