2-(3,4-dihydroxybenzylidene)-4,6-dihydroxy-1-benzofuran-3(2H)-one, (Z)-2-(3,4-dihydroxybenzylidene)-4,6-dihydroxybenzofuran-3(2H)-one, (Z)-2-buten-1,4-diol, 2-[(3,4-dihydroxyphenyl)methylidene]-4,6-dihydroxy-3-benzofura , cis-1,4-dihydroxy-2-butene, (2Z)-2-buten-1,4-diol, (Z)-2-[(3,4-dihydroxyphenyl)methylene]-4,6-dihydroxy-3(2H)-benzofura , (2Z)-2-(3,4-dihydroxybenzylidene)-4,6-dihydroxy-1-benzofuran-3(2H)-one, 2-((Z)-3,4-dihydroxy-benzylidene)-4,6-dihydroxy-benzofuran-3-one, (z)-2-butene-1,4-diol, 2-((Z)-3,4-Dihydroxy-benzyliden)-4,6-dihydroxy-benzofuran-3-on, 2-Butene-1,4-diol, (Z)-, 2-cis-1,4-butene-diol, cis-Butenediol, cis-2-Butene-1,4-diol, cis-2-Buten-1,4-diol, (Z)-But-2-en-1,4-diol