1-beta-D-Arabinofuranosyl-N(sup 4)-caprylcytosine 55726-41-5 BRN 0768470 Cytosine, 1-beta-D-arabinofuranosyl-N(sup 4)-decanoyl- N(sup 4)-Capryl-1-beta-D-arabinofuranosylcytosine