3,4,7-Metheno-3H-1,2,5,6-tetraazocyclobuta[def]fluorene,3a,3b,4,6a,7,7a,7b,7c-octahydro- (8CI);2,3,7,8-Tetraazahexacyclo[7.4.1.04,12.05,14.06,11.010,13]tetradeca-2,7-diene
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