The subject invention provides pharmaceutical compositions containing laquinimod or a pharmaceutically acceptable salt thereof, an isolated compound of N-ethyl-4-hydroxyl-1-methyl-5-(methyl(2,3,4,5,6-pentahydroxyhexyl)amino)-2-oxo-N-phenyl-1,2-dihydroquinoline-3-carboxamide or a salt thereof, compositions containing N-ethyl-4-hydroxyl-1-methyl-5-(methyl(2,3,4,5,6-pentahydroxyhexyl)amino)-2-oxo-N-phenyl-1,2-dihydroquinoline-3-carboxamide and methods of preparing the same.L'invention concerne des compositions pharmaceutiques contenant du laquinimod ou un sel pharmaceutiquement acceptable de celui-ci, un composé isolé de N-éthyl-4-hydroxyl-1-méthyl-5-(méthyl(2,3,4,5,6-pentahydroxyhexyl)amino)-2-oxo-N-phényl-1,2-dihydroquinoléine-3-carboxamide ou un sel de celui-ci, des compositions contenant le N-éthyl-4-hydroxyl-1-méthyl-5-(méthyl(2,3,4,5,6-pentahydroxyhexyl)amino)-2-oxo-N-phényl-1,2-dihydroquinoléine-3-carboxamide et leurs procédés de préparation.
