2-(3,4-Dihydroxy-phenyl)-7-hydroxy-2,3-dihydro-benzofuran-4-carbaldehyde 2-(3,4-dihydroxyphenyl)-7-hydroxy-1-benzofuran-4-carbaldehyde 4-benzofurancarboxaldehyde, 2-(3,4-dihydroxyphenyl)-7-hydroxy- InChI=1/C15H10O5/c16-7-9-2-4-12(18)15-10(9)6-14(20-15)8-1-3-11(17)13(19)5-8/h1-7,17-19 Tournefolal