1-[3-R-(N-Nitrosomethylamino)-4-hydroxybutyl]thymidine 131652-75-0 2,4(1H,3H)-Pyrimidinedione, 1-[4-hydroxy-3-(methylnitrosoamino)butyl]-5-methyl-, (R)- AIDS-001818 AIDS001818 Thymine acyclonucleoside