Valganciclovir Hydrochloride standard

2-[(2-Amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]-3-hydroxypropyl Ester L-Valine Hydrochloride; (S)-Valganciclovir Hydrochloride; L-Valine, ester with 9-[[2-hydroxy-1-(hydroxymethyl)ethoxy]-methyl]guanine, monohydrochloride; L-Valine, 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]-3-hydroxypropyl ester, monohydrochloride (USP);