2,2'-dinitro-4,4'-dimethylbiphenyl

3-(4-methyl-2-nitro-phenyl)-pyridine

4-methoxy-1-(4-methoxy-2-nitrophenyl)-2-nitrobenzene

3-(4-methoxy-2-nitrophenyl)-pyridine

4,4'-diethoxy-2,2'-dinitro-biphenyl