(+-)-3-((3,4-Dihydro-5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-4-oxo-2H-1-benzopyran-7-yl)oxy)-1-propanesulfonic acid monopotassium salt 1-Propanesulfonic acid, 3-((3,4-dihydro-5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-4-oxo-2H-1-benzopyran-7-yl)oxy)-, monopotassium salt, (+-)- 70428-57-8