4-Cyclooctin-1-yl-(4-nitrobenzoat)

4-Oxo-11-oxapentacyclo<6.5.0.01,12.08,10.09,13>tridecan-9,13-dicarbonsaeure-diethylester

6,7,8,9-tetrahydrocyclooctadieno-1,2,3-selenadiazole

4,5,8,9-Tetrahydrocycloocta-1,2,3-selenadiazol

1,1a,2,3,4,7b-Hexahydro-7-selena-5,6-diaza-cyclopropa[e]azulene