RESIDUE   EAX     17
CONECT      OAB    2 CAF  H1  
CONECT      OAA    2 CAG  H2  
CONECT      CAG    3 OAA  OAC  CAI 
CONECT      OAC    1 CAG 
CONECT      CAI    4 CAG  OAE  CAH  H3  
CONECT      OAE    2 CAI  H4  
CONECT      CAH    4 CAI  OAD  CAF  H5  
CONECT      OAD    2 CAH  H6  
CONECT      CAF    4 OAB  CAH  H7   H8  
CONECT      H1     1 OAB 
CONECT      H2     1 OAA 
CONECT      H3     1 CAI 
CONECT      H4     1 OAE 
CONECT      H5     1 CAH 
CONECT      H6     1 OAD 
CONECT      H7     1 CAF 
CONECT      H8     1 CAF 
END   
HET    EAX             17
HETSYN     EAX erythronic acid
HETNAM     EAX (2R,3R)-2,3,4-trihydroxybutanoic acid
FORMUL      EAX    C4 H8 O5