acyclovir monoacetate

Acyclovir monoacetate is an acetylated derivative of acyclovir, featuring an acetoxy group on the terminal hydroxyl of its acyclic side chain. This esterification modifies the parent drug's solubility and metabolic profile. It arises as a synthetic byproduct during acyclovir production via acetylation of the primary hydroxyl group. Structurally, it retains the 9-(2-hydroxyethoxy)methylguanine core with an additional acetyl moiety, distinguishing it from the parent compound. It serves as an HPLC reference standard for impurity profiling in acyclovir-based pharmaceuticals.