9-(5-O-(Hydroxy((hydroxy(phosphonooxy)phosphinyl)oxy)phosphinyl)-beta-D-ribofuranosyl)-6-methoxy-9H-purin-2-amine 99404-63-4 9H-Purin-2-amine, 9-(5-O-(hydroxy((hydroxy(phosphonooxy)phosphinyl)oxy)phosphinyl)-beta-D-ribofuranosyl)-6-methoxy-