1,1'-dimethoxy-5,5'-dinitro-1H,1'H-[2,2']biimidazolyl

5-butoxymethoxy-6-propyl-benzo[1,3]dioxole

7-chloro-4-methoxy-2-thiophen-2-yl-thiazolo[4,5-d]pyridazine

5-amino-4-methoxy-2-methylsulfanyl-thieno[2,3-d]pyrimidine-6-carboxylic acid ethyl ester

8-methoxy-9-methylpurine