1-(2'-Deoxyribosyl)-2-pyrimidinone 1-(beta-D-Deoxyribofuranosyl)-2-pyrimidinone 1-Drpo 2(1H)-Pyrimidinone, 1-(2-deoxy-beta-D-erythro-pentofuranosyl)- 22003-08-3 22003-30-1 83468-53-5