1-(6-Amino-9H-purin-9-yl)-1-deoxy-N-((ethoxycarbonyl)methyl)-beta-D-ribofuranuronamide hydrate 57872-81-8 beta-D-Ribofuranuronamide, 1-(6-amino-9H-purin-9-yl)-1-deoxy-N-(2-ethoxy-2-oxoethyl)-, monohydrate