2(1H)-Pyrimidinone, 4-amino-1-[(1R,4R,5S)-4,5-dihydroxy-3-(hydroxymethyl)-2-cyclopenten-1-yl]- 90597-22-1 AIDS-017048 AIDS017048 Ce-Cyd Cyclopentenylcytosine Cyclopentyl Cytosine NSC375575