2-Ethyl-5-(3-sulfophenyl)isoxazolium, hydroxide, inn er salt 2-Ethyl-5-phenylisoxazolium-3'-sulphonate 4156-16-5 EINECS 223-988-7 Isoxazolium, 2-ethyl-5-(3-sulfophenyl)-, hydroxide, inner salt (9CI) Isoxazolium, 2-ethyl-5-(m-sulfophenyl)-, hydroxide, inner salt (8CI) NSC 82643 Woodward's Reagent K Woodward's reagent potassium