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  |  |     | # | Species | Formula |    | 645 | n-Pentylmalonodinitrile | C8H12N2 |  |    | 646 | Tetramethylbutanedinitrile | C8H12N2 |  |    | 647 | Tetramethylpyrazine | C8H12N2 |  |    | 648 | 1,4-Dimethyl-2,3-diaza-bicyclo[2.2.2]oct-2-ene | C8H14N2 |  |    | 649 | 3,4,5,6-Tetrahydro-3,3,6,6-tetramethylpyridazine | C8H16N2 |  |    | 650 | Di-n-butyldiazene | C8H18N2 |  |    | 651 | Di-tert-butyldiazene | C8H18N2 |  |    | 652 | 1,2-Dibutylhydrazine | C8H20N2 |  |    | 653 | 3-Quinolinamine | C9H8N2 |  |    | 654 | 5-Quinolinamine | C9H8N2 |  |    | 655 | 6-Quinolinamine | C9H8N2 |  |    | 656 | 8-Quinolinamine | C9H8N2 |  |    | 657 | 2-(Diethylamino)-pentanenitrile | C9H18N2 |  |    | 658 | 2,2-Bipyridyl | C10H8N2 |  |    | 659 | 2,4-Bipyridyl | C10H8N2 |  |    | 660 | 4,4'-Bipyridine | C10H8N2 |  |    | 661 | 2,3-Dimethyl quinoxaline | C10H10N2 |  |    | 662 | alpha N,N-dimethylamino phenylacetonitrile | C10H12N2 |  |    | 663 | Ethyl(1,1-dimethylpropyl)malonodinitrile | C10H16N2 |  |    | 664 | Meso-2,3-diethyl-2,3-dimethylsuccinodinitrile | C10H16N2 |  |    | 665 | Methyl(1,1,2-trimethylpropyl)malonodinitrile | C10H16N2 |  | 
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