1-(2-(Hydroxymethyl)-1,3-dioxolan-4-yl)cytosine 141196-85-2 2(1H)-Pyrimidinone, 4-amino-1-(2-(hydroxymethyl)-1,3-dioxolan-4-yl)-, (2R-trans)- 2R(-)-cis-Hmd-cytosine Bch 4556 Bch-4556 Hmd-cytosine beta-L-Dioxolane-cytidine