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| # | Species | Formula |
| 685 | 1,3,5-Triazine | C3H3N3 | |
| 686 | s-Triazine (Geo) | C3H3N3 | |
| 687 | Ethylenetricarbonitrile | HC5N3 | |
| 688 | 1,1,1-Ethanetricarbonitrile | C5H3N3 | |
| 689 | Trisdimethylaminoborane | H18BC6N3 | |
| 690 | 1,3,5-Tricyanobenzene | C9H3N3 | |
| 691 | 1,1,1-Tricyano-2-phenyl ethane | C11H7N3 | |
| 692 | 2,2',6',2'-Terpyridine | C15H11N3 | |
| 693 | Li(I)N3C (DANKUY) (Geo) | H28LiC15N3 | |
| 694 | Li(I)N3C (DANKUY) | H28LiC15N3 | |
| 695 | 1-H Tetrazole | CH2N4 | |
| 696 | 2-H-Tetrazole | CH2N4 | |
| 697 | Tetracyanoethylene | C6N4 | |
| 698 | 1,3,5,7-Tetraazaadamantane | C6H12N4 | |
| 699 | Li(I)N4(+) (PIKWAH) (Geo) | H32LiC12N4 | |
| 700 | Li(I)N4(+) (PIKWAH) | H32LiC12N4 | |
| 701 | Adenine | C5H5N5 | |
| 702 | Melamine | C3H6N6 | |
| 703 | Be(II)3N6 (DMABET10) (Geo) | C12H36Be3N6 | |
| 704 | Oxygen, atom | O | |
| 705 | Hydroxyl radical | HO | |
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