英文别名2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]ethyl N-formyl-L-valinate; Valacyclovir EP Impurity M; N-Formyl-L-valine 2-[(2-Amino-1,6-dihydro-6-oxo-9H-purin-9-yl)Methoxy]ethyl Ester; Valaciclovir Ep Impurity M; 2-[(2-amino-6-oxo-3H-purin-9-yl)methoxy]ethyl (2S)-2-formamido-3-methylbutanoate; Valacyclovir N-formyl Impurity; Valacyclovir Impurity M 
