Synonyms: α-Ionone;α-Ionone nat.;Alpha Ionone , Natural;4-(2, 6, 6-Trimethyl-2-cyclohexen-1-yl) 3-buten-2-one;Natural ionone alpha;(E)-(1)-4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-3-buten-2-one;4-(2,6,6-trimethyl-1-cyclohex-2-enyl)but-3-en-2-one;(E)-4-[(1R)-2,6,6-trimethyl-1-cyclohex-2-enyl]but-3-en-2-one;