6-(1,3-Dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methylhex-4-enoic acid

6-(1,3-dihydro-1-oxo-4-methyl-5-methoxy-7-hydroxyisobenzofuran-6-yl)-4-methyl-4-hexenoic acid ; 6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methylhex-4-enoic acid ; (e)-6-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1h-2-benzofuran-5-yl)-4-methyl-hex-4-enoic acid ; 6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-4-methyl-4-hexenoic acid ; (e)-6-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1h-2-benzofuran-5-yl)-4-methylhex-4-enoic acid ; 6-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydroisobenzofuran-5-yl)-4-methyl-4-hexenoic acid ; (e)-6-(4-hydroxy-3-keto-6-methoxy-7-methyl-1h-isobenzofuran-5-yl)-4-methyl-hex-4-enoic acid ; 4-methyl-6-[3-oxo-7-methyl-4-hydroxy-6-methoxy-1,3-dihydroisobenzofuran-5-yl]-4-hexenoic acid