.delta.1-p-Menthene 1-Methyl-4-isopropyl-1-cyclohexene 1-Methyl-4-isopropylcyclohexene 1-p-Menthene 5502-88-5 Carvomenthene Cyclohexene, 1-methyl-4-(1-methylethyl)- NSC96749 p-Menth-1-ene