英文别名9-[4-acetoxy-3-(hydroxymethyl)but-1-yl]guanine; Penciclovir Monoacetate Impurity; Penciclovir Impurity B; Penciclovir Impurity 2; 6H-Purin-6-one, 9-[4-(acetyloxy)-3-(hydroxymethyl)butyl]-2-amino-1,9-dihydro-; Monoacetate Penciclovir; 4-(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-2-(hydroxymethyl)butyl acetate 
