Structure based on 4dfr

Ideal structure
Name: methotrexate
Formula: C20 H22 N8 O5
Weight: 454.439
SMILES: "CN(Cc1cnc2nc(N)nc(N)c2n1)c3ccc(cc3)C(=O)N[CH](CCC(O)=O)C(O)=O"
Spacial conformation based on PDB 4dfr.
Also present in other 74 PDB entries.
RESIDUE   MTX     55
CONECT      N1     2 C2   C8A 
CONECT      C2     3 N1   NA2  N3  
CONECT      NA2    3 C2   HN21 HN22
CONECT      N3     2 C2   C4  
CONECT      C4     3 N3   NA4  C4A 
CONECT      NA4    3 C4   HN41 HN42
CONECT      C4A    3 C4   N5   C8A 
CONECT      N5     2 C4A  C6  
CONECT      C6     3 N5   C7   C9  
CONECT      C7     3 C6   N8   H7  
CONECT      N8     2 C7   C8A 
CONECT      C8A    3 N1   C4A  N8  
CONECT      C9     4 C6   N10  H91  H92 
CONECT      N10    3 C9   CM   C14 
CONECT      CM     4 N10  HM1  HM2  HM3 
CONECT      C11    3 C12  C16  C   
CONECT      C12    3 C11  C13  H12 
CONECT      C13    3 C12  C14  H13 
CONECT      C14    3 N10  C13  C15 
CONECT      C15    3 C14  C16  H15 
CONECT      C16    3 C11  C15  H16 
CONECT      C      3 C11  O    N   
CONECT      O      1 C   
CONECT      N      3 C    CA   HN  
CONECT      CA     4 N    CT   CB   HA  
CONECT      CT     3 CA   O1   O2  
CONECT      O1     1 CT  
CONECT      O2     2 CT   HO2 
CONECT      CB     4 CA   CG   HB1  HB2 
CONECT      CG     4 CB   CD   HG1  HG2 
CONECT      CD     3 CG   OE1  OE2 
CONECT      OE1    1 CD  
CONECT      OE2    2 CD   HOE2
CONECT      HN21   1 NA2 
CONECT      HN22   1 NA2 
CONECT      HN41   1 NA4 
CONECT      HN42   1 NA4 
CONECT      H7     1 C7  
CONECT      H91    1 C9  
CONECT      H92    1 C9  
CONECT      HM1    1 CM  
CONECT      HM2    1 CM  
CONECT      HM3    1 CM  
CONECT      H12    1 C12 
CONECT      H13    1 C13 
CONECT      H15    1 C15 
CONECT      H16    1 C16 
CONECT      HN     1 N   
CONECT      HA     1 CA  
CONECT      HO2    1 O2  
CONECT      HB1    1 CB  
CONECT      HB2    1 CB  
CONECT      HG1    1 CG  
CONECT      HG2    1 CG  
CONECT      HOE2   1 OE2 
HET    MTX             55
FORMUL      MTX    C20 H22 N8 O5

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