Structure based on 1ohj

Ideal structure
Name: n-(4-carboxy-4-{4-[(2,4-diamino-pteridin-6-ylmethyl)-amino]-benzoylamino}-butyl)-phthalamic acid
Formula: C27 H27 N9 O6
Weight: 573.560
SMILES: "Nc1nc(N)c2nc(CNc3ccc(cc3)C(=O)N[CH](CCCNC(=O)c4ccccc4C(O)=O)C(O)=O)cnc2n1"
Spacial conformation based on PDB 1ohj.
Also present on 1ohk
RESIDUE   COP     69
CONECT      C3     3 N4   N3   N2  
CONECT      C1     3 C10  N2   N1  
CONECT      C10    3 C1   C5   N9  
CONECT      C8     3 C7   C11  N9  
CONECT      C7     3 C8   N6   H7  
CONECT      C5     3 C10  N4   N6  
CONECT      C11    4 C8   N12  H111 H112
CONECT      C13    3 C18  C14  N12 
CONECT      C18    3 C13  C17  H18 
CONECT      C17    3 C18  C16  H17 
CONECT      C16    3 C17  C15  C19 
CONECT      C15    3 C16  C14  H15 
CONECT      C14    3 C13  C15  H14 
CONECT      C19    3 C16  N20  O19 
CONECT      C21    4 C24  C27  N20  H21 
CONECT      C24    3 C21  O24  O25 
CONECT      C27    4 C21  C28  H271 H272
CONECT      C28    4 C27  C29  H281 H282
CONECT      C29    4 C28  N30  H291 H292
CONECT      N4     2 C3   C5  
CONECT      N3     3 C3   HN31 HN32
CONECT      N2     2 C3   C1  
CONECT      N1     3 C1   HN11 HN12
CONECT      N9     2 C10  C8  
CONECT      N6     2 C7   C5  
CONECT      N12    3 C11  C13  HN2 
CONECT      N20    3 C19  C21  HN0 
CONECT      O19    1 C19 
CONECT      O24    1 C24 
CONECT      O25    2 C24  HO5 
CONECT      N30    3 C29  C31  HN3 
CONECT      C31    3 N30  O32  C33 
CONECT      O32    1 C31 
CONECT      C33    3 C31  C38  C34 
CONECT      C38    3 C33  C37  C39 
CONECT      C37    3 C38  C36  H37 
CONECT      C36    3 C37  C35  H36 
CONECT      C35    3 C36  C34  H35 
CONECT      C34    3 C33  C35  H34 
CONECT      C39    3 C38  O40  O41 
CONECT      O40    1 C39 
CONECT      O41    2 C39  HO1 
CONECT      H7     1 C7  
CONECT      H111   1 C11 
CONECT      H112   1 C11 
CONECT      H18    1 C18 
CONECT      H17    1 C17 
CONECT      H15    1 C15 
CONECT      H14    1 C14 
CONECT      H21    1 C21 
CONECT      H271   1 C27 
CONECT      H272   1 C27 
CONECT      H281   1 C28 
CONECT      H282   1 C28 
CONECT      H291   1 C29 
CONECT      H292   1 C29 
CONECT      HN31   1 N3  
CONECT      HN32   1 N3  
CONECT      HN11   1 N1  
CONECT      HN12   1 N1  
CONECT      HN2    1 N12 
CONECT      HN0    1 N20 
CONECT      HO5    1 O25 
CONECT      HN3    1 N30 
CONECT      H37    1 C37 
CONECT      H36    1 C36 
CONECT      H35    1 C35 
CONECT      H34    1 C34 
CONECT      HO1    1 O41 
END   
HET    COP             69
HETSYN     COP PT523
HETNAM     COP N-(4-CARBOXY-4-{4-[(2,4-DIAMINO-PTERIDIN-6-YLMETHYL)-AM
HETNAM   2 COP INO]-BENZOYLAMINO}-BUTYL)-PHTHALAMIC ACID
FORMUL      COP    C27 H27 N9 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