.beta.-Methyltetralin 1,2,3,4-Tetrahydro-2-methylnaphthalene 2-Methyl-[1,2,3,4-tetrahydronaphthalene] 2-Methyltetralin 2-Methyltetraline 3877-19-8 NSC66993 Naphthalene, 1,2,3,4-tetrahydro-2-methyl-