2,6-Dichloro-3-hydroxy-benzeneacetic Acid Methyl Ester + 2,4-Dichloro-5-hydroxy-benzeneacetic Acid Methyl Ester (Mixture) is an intermediate in the synthesis of 3-Hydroxy Guanfacine (H942730). 3-Hydroxy Guanfacine is the main metabolite of Guanfacine (G816000) in human plasma and urine.