RESIDUE   U4R     18
CONECT      C5     4 C6   O4   H51  H5  
CONECT      C6     3 C5   C7   H6  
CONECT      C7     3 C6   C8   H71 
CONECT      C8     4 C7   H8   H82  H81 
CONECT      O1     1 P1  
CONECT      O2     2 P1   H2  
CONECT      O3     2 P1   H1  
CONECT      O4     2 C5   P1  
CONECT      P1     4 O1   O2   O3   O4  
CONECT      H51    1 C5  
CONECT      H5     1 C5  
CONECT      H6     1 C6  
CONECT      H71    1 C7  
CONECT      H8     1 C8  
CONECT      H82    1 C8  
CONECT      H81    1 C8  
CONECT      H1     1 O3  
CONECT      H2     1 O2  
END   
HET    U4R             18
HETNAM     U4R (2E)-but-2-en-1-yl dihydrogen phosphate
FORMUL      U4R    C4 H9 O4 P