1-beta-D-Arabinofuranosyl-N(sup 4)-lauroylcytosine 55726-42-6 BRN 0769413 CYTOSINE, 1-beta-D-ARABINOFURANOSYL-N(sup 4)-LAUROYL- N(sup 4)-Lauroyl-1-beta-D-arabinofuranosylcytosine