RESIDUE   5R5     17
CONECT      N      3 CA   H    H2  
CONECT      CA     4 N    C    CB   HA  
CONECT      C      3 CA   O    OXT 
CONECT      CB     4 CA   OG   HB2  HB3 
CONECT      OG     2 CB   HG  
CONECT      O      1 C   
CONECT      C1     4 OXT  H11  H12  H13 
CONECT      OXT    2 C    C1  
CONECT      H      1 N   
CONECT      H2     1 N   
CONECT      HA     1 CA  
CONECT      HB2    1 CB  
CONECT      HB3    1 CB  
CONECT      HG     1 OG  
CONECT      H11    1 C1  
CONECT      H12    1 C1  
CONECT      H13    1 C1  
END   
HET    5R5             17
HETSYN     5R5 methyl (2~{S})-2-azanyl-3-oxidanyl-propanoate
HETNAM     5R5 methyl L-serinate
FORMUL      5R5    C4 H9 N1 O3