1(2H)-Naphthalenone, 3,4-dihydro-3,3,6,8-tetramethyl- 3,3,6,8-Tetramethyl-1-tetralone 3,3,6,8-Tetramethyl-3,4-dihydro-1(2H)-naphthalenone 5409-55-2 NSC49097