2-(4,6-DiaMino-1,3,5-triazin-2-yl)sulfanylethanesulfonic Acid;Mesna EP Impurity E;Mesna Impurity 5(Mesna EP Impurity E);Ethanesulfonic acid, 2-[(4,6-diamino-1,3,5-triazin-2-yl)thio]-;MesEPImpurityESodiumSalt;2-[(4,6-Diamino-1,3,5-triazin-2-yl)thio]ethanesulfonic acid;Mesna Impurity E;Mesna EP Impurity E Sodium Salt