RESIDUE   OMB      4
CONECT      O      1 C   
CONECT      C      3 O    HC1  HC2 
CONECT      HC1    1 C   
CONECT      HC2    1 C   
END   
HET    OMB              4
HETNAM     OMB OXYMETHYLENE BRIDGING GROUP
FORMUL      OMB    C1 H2 O1