RESIDUE   O2U     19
CONECT      CAC    3 CAD  NAB  OAL 
CONECT      CAD    4 CAC  CAE  CAI  HAD 
CONECT      CAE    4 CAD  CAF  HAF  HAE 
CONECT      CAF    3 CAE  OAG  OAH 
CONECT      CAI    4 CAD  CAJ  HAJ  HAI 
CONECT      CAJ    3 CAI  NAB  OAK 
CONECT      NAB    3 CAC  CAJ  OAA 
CONECT      OAA    2 NAB  H1  
CONECT      OAG    2 CAF  H2  
CONECT      OAH    1 CAF 
CONECT      OAK    1 CAJ 
CONECT      OAL    1 CAC 
CONECT      HAD    1 CAD 
CONECT      HAF    1 CAE 
CONECT      HAE    1 CAE 
CONECT      HAJ    1 CAI 
CONECT      HAI    1 CAI 
CONECT      H1     1 OAA 
CONECT      H2     1 OAG 
END   
HET    O2U             19
HETNAM     O2U [(3S)-1-hydroxy-2,5-dioxopyrrolidin-3-yl]acetic acid
FORMUL      O2U    C6 H7 N O5