Acyclovir EP Impurity - A

Acetic acid 2-(2-amino-6-oxo-1,6-dihydro-purin-9-ylmethoxy)-ethyl ester; Valaciclovir Hydrochloride - Impurity I (EP/BP);  Acyclovir Acetate; Aciclovir Acetate; 9-(2-Acetoxyethoxymethyl)guanine; 9-[[2-(Acetyloxy)ethoxy]methyl]-2-amino-1,9-dihydro-6H-purin-6-one;  2-[(2-Amino-6-oxo-1,6-dihydro-9H -purin-9-yl)methoxy]ethyl Acetate; Acyclovir Related Compound A (USP)