RESIDUE   AS2     15
CONECT      O      1 C   
CONECT      C      3 O    OXT  CA  
CONECT      OXT    2 C    H7  
CONECT      CA     4 C    N    CB   HA  
CONECT      N      3 CA   HN   HNA 
CONECT      CB     4 CA   CG   HB   HBA 
CONECT      CG     3 CB   OD2  HG  
CONECT      OD2    1 CG  
CONECT      HA     1 CA  
CONECT      HN     1 N   
CONECT      HNA    1 N   
CONECT      HB     1 CB  
CONECT      HBA    1 CB  
CONECT      HG     1 CG  
CONECT      H7     1 OXT 
END   
HET    AS2             15
HETSYN     AS2 ASPARTATE SEMIALDEHYDE
HETNAM     AS2 (2R)-2-AMINO-4-OXOBUTANOIC ACID
FORMUL      AS2    C4 H7 N O3