2,5-Methano-5H,9H-pyrimido[2,1-b][1,5,3]dioxazepin-9-one, 2,3-dihydro-8-methyl-3-[(triphenylmethoxy)methyl]-(2R,3R,5R)-

2,3-dihydro-8-methyl-3-[(trityloxy)methyl]-2,5-methano-5h,9h-pyrimido[2,1-b][1,5,3]dioxazepin-9-one ; 5'-o-trityl-2,3'-anhydrothymidine (zidovudine) ; 2',3'-anhydro-5-o-tritylthymidine ; 5'-o-triphenylmethyl-2-deoxy-2',3-didehydrothymidine ; 5-o-trityl-2',3'-anhydrothymidine ; 5''-o-trityl-2,3''-anhydrothymidine (5-ott+1) ; 2,3'-anhydro-1-(2-deoxy-5-o-trityl-b-d-threo-pentofuranosyl)-thymine ; 5-o-triphenylmethyl-2-deoxy-2,3-didehyrothymidine ; 2,3'-anhydro-1-(2-deoxy-5-o-trityl-.beta.-d-threo-pentofuranosyl)thymine ; 5'-trityl-2'-deoxy-2,3'-didehydrothymidine