[EN] SALT OF OXALIC ACID WITH 5-[4-[2-(N-METHYL-N-(2-PYRIDYL)-AMINO)ETHOXY]BENZYL]THIAZOLIDIN-2,4-DIONE AND A METHOD OF ITS PREPARATION AND ITS USE [FR] SEL D'ACIDE OXALIQUE AVEC 5-[4-[2-N-METHYL-N-(2-PYRIDYL)-AMINO)ETHOXY]BENZYL]THIAZOLIDIN-2,4-DIONE, ET PROCEDE DE PREPARATION ET D'UTILISATION