N-(2'-hydroxyethyl)-2,4-dihydroxy-benzamide, 2,4-dihydroxy-benzoic acid-(2-hydroxy-ethylamide), (2,4-dihydroxyphenyl)-N-(2-hydroxyethyl)carboxamide, 2,4-Dihydroxy-benzoesaeure-(2-hydroxy-aethylamid), 2,4-dihydroxy-N-(2-hydroxy-ethyl)benzamide, 2,4,6-TRIPHENYLPYRYLIUM TRIFLUOROMETHANESULFONATE, 2,4-Dihydroxybenzoic ethanolamide