RESIDUE   Q3O     16
CONECT      C02    3 C03  C10  O01 
CONECT      C03    3 C02  C04  N07 
CONECT      C04    3 C03  O05  O06 
CONECT      C08    3 C09  N07  H081
CONECT      C09    3 C08  C10  H091
CONECT      C10    3 C02  C09  O11 
CONECT      N07    3 C03  C08  H071
CONECT      O01    2 C02  H1  
CONECT      O05    2 C04  H2  
CONECT      O06    1 C04 
CONECT      O11    1 C10 
CONECT      H081   1 C08 
CONECT      H091   1 C09 
CONECT      H071   1 N07 
CONECT      H1     1 O01 
CONECT      H2     1 O05 
END   
HET    Q3O             16
HETNAM     Q3O 3-hydroxy-4-oxo-1,4-dihydropyridine-2-carboxylic acid
FORMUL      Q3O    C6 H5 N O4