^US 7985753,Danysz W, Dekundy A, Hechenberger M, Henrich M, Jatzke C, Nagel J, Parsons CG, Weil T, Fotins J, Gutcaits A, Kalvinsh I, Zemribo R, Kauss V,「Substituted pyrazolo[1,5-A]pyrimidines as metabotropic glutamate receptor modulators.」,发行于4 August 2006,指定于Merz Pharmaceuticals GmbH