9-(4-hydroxy-2-(hydroxymethyl)butyl)guanine

9-[4-Hydroxy-2-(hydroxymethyl)butyl]-2-amino-9H-purin-6(1H)-one

2-Amino-1,9-dihydro-9-[4-hydroxy-2-(hydroxymethyl)butyl]-6H-purin-6-one

2-Amino-9-[2-(hydroxymethyl)-4-hydroxybutyl]-6,9-dihydro-1H-purine-6-one