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| # | Species | Formula |
| 337 | 2,4,5,7-Tetramethyl-4,5-bis(4-t-butylphenyl) octane | C32H50 | |
| 338 | Dotriacontane | C32H66 | |
| 339 | 4,5-Dipropyl-4,5-bis(4-t-butylphenyl) octane | C34H54 | |
| 340 | Nitrogen, cation | N | |
| 341 | Nitrogen, atom | N | |
| 342 | Amidogen | H2N | |
| 343 | Ammonia | H3N | |
| 344 | Ammonia (Geo) | H3N | |
| 345 | Ammonium, cation | H4N | |
| 346 | 5,6-Dibutyl-5,6-bis(4-tert-butylphenyl)decane | C38H62 | |
| 347 | Cyanide | CN | |
| 348 | Hydrogen cyanide (Geo) | HCN | |
| 349 | Hydrogen cyanide | HCN | |
| 350 | CH2-NH2, cation | CH4N | |
| 351 | CH3-NH. | CH4N | |
| 352 | CH3NH, anion | CH4N | |
| 353 | Methylamine (Geo) | CH5N | |
| 354 | Methylamine | CH5N | |
| 355 | Acetonitrile | C2H3N | |
| 356 | Acetonitrile (Geo) | C2H3N | |
| 357 | Methyl isocyanide (Geo) | C2H3N | |
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