p. 2366 - 2370
(2007/10/02)4,7-Di-2-pyridyl-5,6,11,12-tetraazatetracyclo<8.2.2.02,9.03,8>tetradeca-3,5,7,13-tetraen-11,12-dicarbonsaeure-diethylester
4,7-Di-2-pyridyl-5,6,11,12-tetraazatetracyclo<8.2.2.02,9.03,8>tetradeca-4,6,13-trien-11,12-dicarbonsaeure-diethylester
3,6-di(2'-pyridyl)-1,2,4,5-tetrazine
4-Phenyl-1,2,4-triazolidine-3,5-dione
1,4-Di-2-pyridylcycloocta