N-t-Boc-valacyclovir;N-tert-Butoxycarbonyl-L-valine-2-[(2-aMino-1,6-dihydro-6-oxo-9H-purin-9-yl)Methoxy]ethylEster;Boc-Valacycloir;L-Valine,N-[(1,1-dimethylethoxy)carbonyl]-,2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]ethylester;ValacyclovirImpurity30;(S)-2-((2-Amino-6-oxo-1H-purin-9(6H)-yl)methoxy)ethyl2-((tert-butoxycarbonyl)amino)-3-methylbutanoate;ValaciclovirimpurityS(Y0001655);2-[(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]ethylN-[(1,1-dimethylethoxy)carbonyl]-L-valinate