Structure based on 1ld7

Ideal structure
Name: (20s)-19,20,22,23-tetrahydro-19-oxo-5h,21h-18,20-ethano-12,14-etheno-6,10-methenobenz[d]imidazo[4,3-l][1,6,9,13]oxatriazacyclonoadecosine-9-carbonitrile
Formula: C27 H27 N5 O2
Weight: 453.536
SMILES: "O=C1[CH]2CCN1c3cccc4ccc(O[CH]5CC(=CC[CH]5C#N)Cn6cncc6CCN2)cc34"
Spacial conformation based on PDB 1ld7
RESIDUE   U66     61
CONECT      C      3 C1   C2   C3  
CONECT      C1     3 C    N    C4  
CONECT      C2     3 C    C5   C6  
CONECT      C3     3 C    C7   H31 
CONECT      N      3 C1   C8   C9  
CONECT      C4     3 C1   C10  H41 
CONECT      C5     3 C2   C11  H51 
CONECT      C6     3 C2   C10  H61 
CONECT      C7     3 C3   C11  O   
CONECT      C8     3 N    C12  O13 
CONECT      C9     4 N    C14  H91  H92 
CONECT      C10    3 C4   C6   H101
CONECT      C11    3 C5   C7   H111
CONECT      O      2 C7   C15 
CONECT      C12    4 C8   C14  N16  H121
CONECT      O13    1 C8  
CONECT      C14    4 C9   C12  H141 H142
CONECT      C15    4 O    C17  C18  H151
CONECT      N16    3 C12  C19  H161
CONECT      C17    4 C15  C20  C21  H117
CONECT      C18    4 C15  C22  H181 H182
CONECT      C19    4 N16  C23  H191 H192
CONECT      C20    4 C17  C24  H201 H202
CONECT      C21    2 C17  N25 
CONECT      C22    3 C18  C24  C26 
CONECT      C23    4 C19  C27  H231 H232
CONECT      C24    3 C20  C22  H241
CONECT      N25    1 C21 
CONECT      C26    4 C22  N28  H261 H262
CONECT      C27    3 C23  N28  C29 
CONECT      N28    3 C26  C27  C30 
CONECT      C29    3 C27  NZ   H291
CONECT      C30    3 N28  NZ   H301
CONECT      NZ     2 C29  C30 
CONECT      H31    1 C3  
CONECT      H41    1 C4  
CONECT      H51    1 C5  
CONECT      H61    1 C6  
CONECT      H91    1 C9  
CONECT      H92    1 C9  
CONECT      H101   1 C10 
CONECT      H111   1 C11 
CONECT      H121   1 C12 
CONECT      H141   1 C14 
CONECT      H142   1 C14 
CONECT      H151   1 C15 
CONECT      H161   1 N16 
CONECT      H117   1 C17 
CONECT      H181   1 C18 
CONECT      H182   1 C18 
CONECT      H191   1 C19 
CONECT      H192   1 C19 
CONECT      H201   1 C20 
CONECT      H202   1 C20 
CONECT      H231   1 C23 
CONECT      H232   1 C23 
CONECT      H241   1 C24 
CONECT      H261   1 C26 
CONECT      H262   1 C26 
CONECT      H291   1 C29 
CONECT      H301   1 C30 
END   
HET    U66             61
HETSYN     U66 COMPOUND 66
HETNAM     U66 (20S)-19,20,22,23-TETRAHYDRO-19-OXO-5H,21H-18,20-ETHANO
HETNAM   2 U66 -12,14-ETHENO-6,10-METHENOBENZ[D]IMIDAZO[4,3-L][1,6,9,1
HETNAM   3 U66 3]OXATRIA
ZACYCLONOADECOSINE-9-CARBONITRILE
FORMUL      U66    C27 H27 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