1561-99-5 (POTASSIUM SALT) 2-Hydroxyethanesulfonic acid AIDS-155827 AIDS155827 Ethanesulfonic acid, 2-hydroxy- Ethanesulfonic acid, 2-hydroxy-, monopotassium salt NSC1898 (POTASSIUM SALT) Potassium 2-hydroxyethanesulfonate Potassium isethionate