137427-72-6 1H-Imidazo(4,5-c)pyridin-4-amine, 1-((2-hydroxy-1,4,2-dioxaphosphorinan-5-yl)methyl)-, P-oxide, (S)- 3-Deaza-9-(3-hydroxy-2-phosphonylmethoxypropyl)adenine Hpmpc3A