1-(2,3-dimethylphenyl)-2,3-dimethylbenzene;1-methoxy-3-(3-methoxy-2-methylphenyl)-2-methylbenzene;2-methyl-1-(2-methylanthracen-1-yl)anthracene;2-methyl-1-(2-methylnaphthalen-1-yl)naphthalene;2-methyl-1-(2-methylphenyl)naphthalene;2-methyl-1-[2-methyl-3-(trifluoromethyl)phenyl]-3-(trifluoromethyl)benzene;1,3,6,8-tetramethylnaphthalene;1,2,4-trimethyl-3-(2,3,6-trimethylphenyl)benzene;trimethyl(2-trimethylsilylethyl)silane