RESIDUE   SZB     10
CONECT      O1     1 C3  
CONECT      C3     3 O1   C2   N   
CONECT      C2     3 C3   C1   H1  
CONECT      C1     3 C2   C    H2  
CONECT      N      3 C3   C    H3  
CONECT      C      3 C1   N    O   
CONECT      O      1 C   
CONECT      H1     1 C2  
CONECT      H2     1 C1  
CONECT      H3     1 N   
END   
HET    SZB             10
HETSYN     SZB pyrrolidine-2,5-dione; pyrrole-2,5-dione; 2,5-pyrrolidi
HETSYN   2 SZB nedione
HETNAM     SZB succinimide
FORMUL      SZB    C4 H3 N1 O2