Structure based on 1hlk

Ideal structure
Name: 7,8-dihydroxy-1-methoxy-3-methyl-10-oxo-4,10-dihydro-1h,3h-pyrano[4,3-b]chromene-9-carboxylic acid
Formula: C15 H14 O8
Weight: 322.267
SMILES: "CO[CH]1O[CH](C)CC2=C1C(=O)c3c(O2)cc(O)c(O)c3C(O)=O"
Spacial conformation based on PDB 1hlk.
Also present on 1kr3
RESIDUE   113     37
CONECT      C1     3 C2   C6   O17 
CONECT      C2     3 C1   C3   H2  
CONECT      C3     3 C2   C4   O8  
CONECT      C4     3 C3   C5   C11 
CONECT      C5     3 C4   C6   C18 
CONECT      C6     3 C1   C5   O16 
CONECT      O8     2 C3   C9  
CONECT      C9     3 O8   C10  C12 
CONECT      C10    3 C9   C11  C15 
CONECT      C11    3 C4   C10  O31 
CONECT      C12    4 C9   C13  H121 H122
CONECT      C13    4 C12  O14  C26  H13 
CONECT      O14    2 C13  C15 
CONECT      C15    4 C10  O14  O20  H15 
CONECT      O16    2 C6   H16 
CONECT      O17    2 C1   H17 
CONECT      C18    3 C5   O19  O30 
CONECT      O19    2 C18  H19 
CONECT      O20    2 C15  C22 
CONECT      C22    4 O20  H221 H222 H223
CONECT      C26    4 C13  H261 H262 H263
CONECT      O30    1 C18 
CONECT      O31    1 C11 
CONECT      H2     1 C2  
CONECT      H121   1 C12 
CONECT      H122   1 C12 
CONECT      H13    1 C13 
CONECT      H15    1 C15 
CONECT      H16    1 O16 
CONECT      H17    1 O17 
CONECT      H19    1 O19 
CONECT      H221   1 C22 
CONECT      H222   1 C22 
CONECT      H223   1 C22 
CONECT      H261   1 C26 
CONECT      H262   1 C26 
CONECT      H263   1 C26 
END   
HET    113             37
HETNAM     113 7,8-DIHYDROXY-1-METHOXY-3-METHYL-10-OXO-4,10-DIHYDRO-1H
HETNAM   2 113 ,3H-PYRANO[4,3-B]CHROMENE-9-CARBOXYLIC ACID
FORMUL      113    C15 H14 O8

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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