9-(4-hydroxy-3-(hydroxymethyl)butyl)-1H-purine-2,6(3H,9H)-dione;3,9-Dihydro-9-[4-hydroxy-3-(hydroxymethyl)butyl]-1H-Purine-2,6-dione;2-Deamino-(2,3-dihydro-2-oxo) Penciclovir
9-(4-hydroxy-3-(hydroxymethyl)butyl)-1H-purine-2,6(3H,9H)-dione;3,9-Dihydro-9-[4-hydroxy-3-(hydroxymethyl)butyl]-1H-Purine-2,6-dione;2-Deamino-(2,3-dihydro-2-oxo) Penciclovir