1-[(2-Hydroxyethoxy)methyl]-7-amino-,3,6,8-Tetraazaspiro[4.4]non-6-ene-2,4,9-trione

This compound is an active pharmaceutical ingredient impurity associated with acyclovir. It is a spirocyclic molecule containing amide, amine, alcohol, and ether functional groups, with a polar, non-aromatic structure.