RESIDUE   CBM      8
CONECT      C1     3 C2   O1   O2  
CONECT      C2     4 C1   H21  H22  H23 
CONECT      O1     1 C1  
CONECT      O2     2 C1   HO1 
CONECT      H21    1 C2  
CONECT      H22    1 C2  
CONECT      H23    1 C2  
CONECT      HO1    1 O2  
END   
HET    CBM              8
HETNAM     CBM CARBOXYMETHYL GROUP
FORMUL      CBM    C2 H4 O2