3-Buten-2-one, 4-(2,5,6,6-tetramethyl-1-cyclohexen-1-yl)- 4-(2,5,6,6-Tetramehtyl-1-cyclohexenyl)-3-buten-2-one 4-(2,5,6,6-Tetramethyl-1-cyclohexen-1-yl)-3-buten-2-one 79-70-9 EINECS 201-220-1 beta-Irone