1 ZBC (2s)-3-(4-amino-5-bromo-2-oxopyrimidin-1(2h)-yl)-2-hydroxypropyl dihydrogen phosphate 1.000 2 ZCY (S)-1'-(2',3'-dihydroxypropyl)-cytosine 0.944 3 ZBU (S)-1'-(2',3'-dihydroxypropyl)-5-bromo-uracil 0.895 4 8RJ (R)-1'-(2',3'-dihydroxypropyl)-thymine 0.800 5 ZTH (S)-1'-(2',3'-dihydroxypropyl)-thymine 0.800