Structure based on 1v3q

Ideal structure
Name: 9-[(2r,5r)-5-(hydroxymethyl)tetrahydrofuran-2-yl]-1,9-dihydro-6h-purin-6-one
Formula: C10 H12 N4 O3
Weight: 236.227
SMILES: "OC[CH]1CC[CH](O1)n2cnc3C(=O)NC=Nc23"
Spacial conformation based on PDB 1v3q
RESIDUE   2DI     29
CONECT      N9     3 C4   C8   C1' 
CONECT      C4     3 N9   N3   C5  
CONECT      N3     2 C4   C2  
CONECT      C2     3 N3   N1   H2  
CONECT      N1     3 C2   C6   HN1 
CONECT      C6     3 N1   O6   C5  
CONECT      O6     1 C6  
CONECT      C5     3 C4   C6   N7  
CONECT      N7     2 C5   C8  
CONECT      C8     3 N9   N7   H8  
CONECT      C5'    4 O5'  C4'  H5'1 H5'2
CONECT      O5'    2 C5'  H5' 
CONECT      C4'    4 C5'  O4'  C3'  H4' 
CONECT      O4'    2 C4'  C1' 
CONECT      C1'    4 N9   O4'  C2'  H1' 
CONECT      C2'    4 C1'  C3'  H2'1 H2'2
CONECT      C3'    4 C4'  C2'  H3'1 H3'2
CONECT      H2     1 C2  
CONECT      HN1    1 N1  
CONECT      H8     1 C8  
CONECT      H5'1   1 C5' 
CONECT      H5'2   1 C5' 
CONECT      H5'    1 O5' 
CONECT      H4'    1 C4' 
CONECT      H1'    1 C1' 
CONECT      H2'1   1 C2' 
CONECT      H2'2   1 C2' 
CONECT      H3'1   1 C3' 
CONECT      H3'2   1 C3' 
END   
HET    2DI             29
HETSYN     2DI 2',3'-DIDEOXYINOSINE; Didanosine
HETNAM     2DI 9-[(2R,5R)-5-(HYDROXYMETHYL)TETRAHYDROFURAN-2-YL]-1,9-D
HETNAM   2 2DI IHYDRO-6H-PURIN-6-ONE
FORMUL      2DI    C10 H12 N4 O3

This OCA MONOMER page
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