RESIDUE   MUC     16
CONECT      C1     3 O1   O2   C2  
CONECT      O1     2 C1   HO1 
CONECT      O2     1 C1  
CONECT      C4     3 C5   C3   H4  
CONECT      C5     3 C4   C6   H5  
CONECT      C6     3 C5   O6   O3  
CONECT      O6     1 C6  
CONECT      O3     2 C6   C3  
CONECT      C3     4 C4   O3   C2   H3  
CONECT      C2     4 C1   C3   H2   H2A 
CONECT      H4     1 C4  
CONECT      H5     1 C5  
CONECT      H3     1 C3  
CONECT      H2     1 C2  
CONECT      H2A    1 C2  
CONECT      HO1    1 O1  
END   
HET    MUC             16
HETSYN     MUC muconolactone
HETNAM     MUC [(2S)-5-oxo-2,5-dihydrofuran-2-yl]acetic acid
FORMUL      MUC    C6 H6 O4