Structure based on 3fsk

Ideal structure
Name: 3-(2-chlorophenyl)-7-[(trans-4-hydroxycyclohexyl)amino]-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1h)-one
Formula: C18 H20 Cl N5 O2
Weight: 373.837
SMILES: "O[CH]1CC[CH](CC1)Nc2ncc3CN(C(=O)Nc3n2)c4ccccc4Cl"
Spacial conformation based on PDB 3fsk
RESIDUE   RO6     46
CONECT      C1     3 N11  N10  N2  
CONECT      N11    2 C1   C12 
CONECT      C12    3 N11  N15  C14 
CONECT      N15    3 C12  C16  HN15
CONECT      C16    3 N15  O19  N17 
CONECT      O19    1 C16 
CONECT      N17    3 C16  C20  C18 
CONECT      C20    3 N17  C21  C25 
CONECT      C21    3 C20  C22  H21 
CONECT      C22    3 C21  C23  H22 
CONECT      C23    3 C22  C24  H23 
CONECT      C24    3 C23  C25  H24 
CONECT      C25    3 C20  C24  CL26
CONECT      CL26   1 C25 
CONECT      C18    4 N17  C14  H18  H18A
CONECT      C14    3 C12  C18  C13 
CONECT      N10    2 C1   C13 
CONECT      C13    3 C14  N10  H13 
CONECT      N2     3 C1   C3   HN2 
CONECT      C3     4 N2   C4   C8   H3  
CONECT      C4     4 C3   C5   H4   H4A 
CONECT      C5     4 C4   C6   H5   H5A 
CONECT      C6     4 C5   O9   C7   H6  
CONECT      O9     2 C6   HO9 
CONECT      C7     4 C6   C8   H7   H7A 
CONECT      C8     4 C3   C7   H8   H8A 
CONECT      HN15   1 N15 
CONECT      H21    1 C21 
CONECT      H22    1 C22 
CONECT      H23    1 C23 
CONECT      H24    1 C24 
CONECT      H18    1 C18 
CONECT      H18A   1 C18 
CONECT      H13    1 C13 
CONECT      HN2    1 N2  
CONECT      H3     1 C3  
CONECT      H4     1 C4  
CONECT      H4A    1 C4  
CONECT      H5     1 C5  
CONECT      H5A    1 C5  
CONECT      H6     1 C6  
CONECT      HO9    1 O9  
CONECT      H7     1 C7  
CONECT      H7A    1 C7  
CONECT      H8     1 C8  
CONECT      H8A    1 C8  
END   
HET    RO6             46
HETNAM     RO6 3-(2-chlorophenyl)-7-[(trans-4-hydroxycyclohexyl)amino]
HETNAM   2 RO6 -3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one
FORMUL      RO6    C18 H20 Cl1 N5 O2

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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