55039-05-9 Methyl 1-deoxy-1-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-beta-D-ribofuranuronate beta-D-ribofuranuronic acid, 1-deoxy-1-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-, methyl ester