1,2,3,5-Tetramethyl-4,6-di(2,2-dimethylpropyl)benzene 33781-73-6 Benzene, 1,2,3,5-tetramethyl-4,6-dineopentyl- Benzene, 1,3-bis(2,2-dimethylpropyl)-2,4,5,6-tetramethyl- Dineopentylisodurene NSC135881