1-beta-D-Arabinofuranosyl-N(sup 4)-pentadecanoylcytosine 59252-35-6 BRN 0726811 CYTOSINE, 1-beta-D-ARABINOFURANOSYL-N(sup 4)-PENTADECANOYL- N(sup 4)-Pentadecanoyl-1-beta-D-arabinofuranosylcytosine