2-amino-9-(4-chloro-3-(hydroxymethyl)butyl)-3H-purin-6(9H)-one;2-Amino-9-(4-chloro-3-(hydroxymethyl)butyl)-1H-purin-6(9H)-one;4-Dehydroxy-4-chloro Penciclovir
2-amino-9-(4-chloro-3-(hydroxymethyl)butyl)-3H-purin-6(9H)-one;2-Amino-9-(4-chloro-3-(hydroxymethyl)butyl)-1H-purin-6(9H)-one;4-Dehydroxy-4-chloro Penciclovir