.beta.-Ionone, methyl- .beta.-Iraldeine .beta.-Methylionone 1-Penten-3-one, 1-(2,6,6-trimethyl-1-cyclohexen-1-yl)- 127-43-5 5-(2,6,6-Trimethyl-1-cyclohexenyl)-4-penten-3-one Beta methyl ionone Methyl-.beta.-ionone NSC163995