1-beta-D-Arabinofuranosyl-N(sup 4)-margaroylcytosine 59252-37-8 BRN 0728949 CYTOSINE, 1-beta-D-ARABINOFURANOSYL-N(sup 4)-MARGAROYL- N(sup 4)-Margaroyl-1-beta-D-arabinofuranosylcytosine