(1R,4R)-p-Menthane-3-one (2R)-2β-Isopropyl-5β-methylcyclohexane-1-one (2R)-2βα-Isopropyl-5β-methylcyclohexanone [1R,4R,(+)]-p-Menthan-3-one (2R,5R)-2-isopropyl-5-methyl-cyclohexanone (2R,5R)-5-methyl-2-propan-2-yl-cyclohexan-1-one (2R,5R)-5-methyl-2-propan-2-ylcyclohexan-1-one Isomenthone Impurity 1 ((+)-Isomenthone)