121032-22-2 170U88 2'-Valeryl-6-methoxypurine arabinoside 6-Methoxy-9-((2-O-valeryl)-beta-D-arabinofuranosyl)-9H-purine 9H-Purine, 6-methoxy-9-(2-O-(1-oxopentyl)-beta-D-arabinofuranosyl)-