1-Propanesulfonic acid, 3-((4-hydroxy-3-(2-(3-hydroxy-4-methoxyphenyl)ethyl)-1,2-benzisoxazol-6-yl)oxy)-, monopotassium salt 3-((4-Hydroxy-3-(2-(3-hydroxy-4-methoxyphenyl)ethyl)-1,2-benzisoxazol-6-yl)oxy)-1-propanesulfonic acid monopotassium salt 70413-09-1