Structure based on 1md2

Ideal structure
Name: 3-ethylamino-4-methylamino-cyclobutane-1,2-dione
Formula: C7 H12 N2 O2
Weight: 156.182
SMILES: "CCN[CH]1[CH](NC)C(=O)C1=O"
Spacial conformation based on PDB 1md2
RESIDUE   SQ      23
CONECT      O1     1 C2  
CONECT      O2     1 C3  
CONECT      N1     3 C1   C6   H1  
CONECT      N2     3 C4   C5   H3  
CONECT      C1     4 N1   C2   C4   H2  
CONECT      C2     3 O1   C1   C3  
CONECT      C3     3 O2   C2   C4  
CONECT      C4     4 N2   C1   C3   H4  
CONECT      C5     4 N2   H10  H11  H12 
CONECT      C6     4 N1   C7   H5   H6  
CONECT      C7     4 C6   H7   H8   H9  
CONECT      H1     1 N1  
CONECT      H3     1 N2  
CONECT      H2     1 C1  
CONECT      H4     1 C4  
CONECT      H10    1 C5  
CONECT      H11    1 C5  
CONECT      H12    1 C5  
CONECT      H5     1 C6  
CONECT      H6     1 C6  
CONECT      H7     1 C7  
CONECT      H8     1 C7  
CONECT      H9     1 C7  
END   
HET    SQ              23
HETSYN     SQ  SQUARIC ACID
HETNAM     SQ  3-ETHYLAMINO-4-METHYLAMINO-CYCLOBUTANE-1,2-DIONE
FORMUL      SQ     C7 H12 N2 O2

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