1 139 Adenosine-5'-[trihydrogen diphosphate] P'-3'-ester with 2'-deoxyuridine 1.000 2 PUA Adenylate-3'-phosphate-[[2'-deoxy-uridine-5'-phosphate]-3'-phosphate] 0.769 3 PAX 5'-phosphothymidine (3'-5')-pyrophosphate adenosine 3'-phosphate 0.755