108274-04-0 3-Ribofuranosyl-4,9-dihydro-4,6,7-trimethyl-9-oxoimidazo(1,2-a)purine 7-Methyl Y nucleoside 9H-Imidazo(1,2-a)purin-9-one, 3,4-dihydro-4,6,7-trimethyl-3-beta-D-ribofuranosyl-