1,2,3,4-Tetramethyl-5,6-di(2,2-dimethylpropyl)benzene 6668-20-8 Benzene, 1,2,3,4-tetramethyl-5,6-dineopentyl- Benzene, 1,2-bis(2,2-dimethylpropyl)-3,4,5,6-tetramethyl- Dineopentylprehnitene NSC135885