15981-92-7 2,3'-O-Cyclothymidine 2,5-Methano-5H,9H-pyrimido[2,1-b][1,5,3]dioxazepin-9-one, 2,3-dihydro-3-(hydroxymethyl)-8-methyl- 2,5-Methano-5H,9H-pyrimido[2,1-b][1,5,3]dioxazepin-9-one, 2,3-dihydro-3-(hydroxymethyl)-8-methyl-, (2R,3R,5R)- AHT AIDS-015652 AIDS015652 Anhydrothymidine NSC144601 O2,3'-Cyclothymidine