Structure based on 2xn7

Ideal structure
Name: 3',6'-dihydroxy-3-oxo-3h-spiro[2-benzofuran-1,9'-xanthene]-5-carboxylic acid
Formula: C21 H12 O7
Weight: 376.316
SMILES: "OC(=O)c1ccc2c(c1)C(=O)O[C]23c4ccc(O)cc4Oc5cc(O)ccc35"
Spacial conformation based on PDB 2xn7
RESIDUE   F6Z     40
CONECT      O1     1 C1  
CONECT      C1     3 O1   C2   O2  
CONECT      C2     3 C1   C3   C19 
CONECT      C3     3 C2   C4   H3  
CONECT      C4     3 C3   C21  C25 
CONECT      O2     2 C1   C5  
CONECT      C5     4 O2   C6   C18  C19 
CONECT      C6     3 C5   C7   C12 
CONECT      C7     3 C6   C8   H7  
CONECT      C8     3 C7   C9   H8  
CONECT      C9     3 C8   O3   C11 
CONECT      O3     2 C9   HA  
CONECT      C11    3 C9   C12  H11 
CONECT      C12    3 C6   C11  O4  
CONECT      O4     2 C12  C13 
CONECT      C13    3 O4   C14  C18 
CONECT      C14    3 C13  C15  H14 
CONECT      C15    3 C14  O5   C16 
CONECT      O5     2 C15  H5  
CONECT      C16    3 C15  C17  H16 
CONECT      C17    3 C16  C18  H17 
CONECT      C18    3 C5   C13  C17 
CONECT      C19    3 C2   C5   C20 
CONECT      C20    3 C19  C21  H20 
CONECT      C21    3 C4   C20  H21 
CONECT      O6     1 C25 
CONECT      C25    3 C4   O6   O7  
CONECT      O7     2 C25  H71 
CONECT      H3     1 C3  
CONECT      H21    1 C21 
CONECT      H7     1 C7  
CONECT      H8     1 C8  
CONECT      HA     1 O3  
CONECT      H11    1 C11 
CONECT      H14    1 C14 
CONECT      H5     1 O5  
CONECT      H16    1 C16 
CONECT      H17    1 C17 
CONECT      H20    1 C20 
CONECT      H71    1 O7  
END   
HET    F6Z             40
HETNAM     F6Z 3',6'-DIHYDROXY-3-OXO-3H-SPIRO[2-BENZOFURAN-1,9'-XANTHE
HETNAM   2 F6Z NE]-5-CARBOXYLIC ACID
FORMUL      F6Z    C21 H12 O7

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