RESIDUE   ZPO     16
CONECT      N      3 CD   NA   H   
CONECT      CB     4 CG   NA   HB3  HB2 
CONECT      CG     4 CB   CD   HG2  HG3 
CONECT      C      3 O    NA   OXT 
CONECT      O      1 C   
CONECT      CD     4 N    CG   HD2  HD3 
CONECT      NA     3 N    CB   C   
CONECT      H      1 N   
CONECT      HB3    1 CB  
CONECT      HB2    1 CB  
CONECT      HG2    1 CG  
CONECT      HG3    1 CG  
CONECT      HD2    1 CD  
CONECT      HD3    1 CD  
CONECT      OXT    2 C    HXT 
CONECT      HXT    1 OXT 
END   
HET    ZPO             16
HETNAM     ZPO pyrazolidine-1-carboxylic acid
FORMUL      ZPO    C4 H8 N2 O2