In the title compound, C16H16N4O 3, which displays good herbicidal activity, the planar bicyclic triazolopyrimidine system is bound to an ethyl benzoate moiety via an oxo bridge, with a dihedral angle of 73.98 (2)° between the bicylic triazolopyrimidine system and the benzene ring. In the crystal structure, molecules are linked by intermolecular C-H⋯O hydrogen bonds and π-π stacking interactions between the triazolopyrimidine rings. © 2005 International Union of Crys...
