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  |  |     | # | Species | Formula |    | 634 | 1-Methyl-1-phenylhydrazine | C7H10N2 |  |    | 635 | t-Butylmalononitrile | C7H10N2 |  |    | 636 | Trimethyl pyrazine | C7H10N2 |  |    | 637 | 1-Piperidineacetonitrile | C7H12N2 |  |    | 638 | 3,3,5,5-Tetramethyl-1-pyrazoline | C7H14N2 |  |    | 639 | m-Dicyanobenzene | C8H4N2 |  |    | 640 | o-Dicyanobenzene | C8H4N2 |  |    | 641 | p-Dicyanobenzene | C8H4N2 |  |    | 642 | Phthalazine | C8H6N2 |  |    | 643 | Quinazoline | C8H6N2 |  |    | 644 | Quinoxaline | C8H6N2 |  |    | 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 |  | 
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