Valaciclovir EP Impurity O

Chemical Name: 2-[[2-[[[[9-[(2-Hydroxyethoxy)methyl]-6-oxo-6,9-dihydro-1H-purin-2-yl] amino] methyl]amino]-6-oxo-1,6-dihydro-9H-purin-9-yl]methoxy]ethyl L-valinate ;