1-Hydroxy-3-isobutyl-4-[4-(3-methyl-but-2-enyloxy)-phenyl]-pyrrole-2,5-dione 1-hydroxy-3-isobutyl-4-{4-[(3-methylbut-2-en-1-yl)oxy]phenyl}-1H-pyrrole-2,5-dione 1H-pyrrole-2,5-dione, 1-hydroxy-3-[4-[(3-methyl-2-butenyl)oxy]phenyl]-4-(2-methylpropyl)- 3-Isobutyl-4-[4-(3-methyl-2-butenyloxy)phenyl]-1H-pyrrol-1-ol-2,5-dione InChI=1/C19H23NO4/c1-12(2)9-10-24-15-7-5-14(6-8-15)17-16(11-13(3)4)18(21)20(23)19(17)22/h5-9,13,23H,10-11H2,1-4H