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| # | Species | Formula |
| 542 | n-Octylamine | C8H19N | |
| 543 | Isoquinoline | C9H7N | |
| 544 | Quinoline | C9H7N | |
| 545 | 2,6-Dimethylbenzonitrile | C9H9N | |
| 546 | (1a,2a,4a)-Bicyclo[2.2.2]oct-5-ene-2-carbonitrile | C9H11N | |
| 547 | (1a,2b,4a)-Bicyclo[2.2.2]oct-5-ene-2-carbonitrile | C9H11N | |
| 548 | 1,2,3,4-Tetrahydroquinoline | C9H11N | |
| 549 | 5,6,7,8-Tetrahydroquinoline | C9H11N | |
| 550 | N,N-Dimethyl m-toluidine | C9H13N | |
| 551 | N,N-Dimethyl p-toluidine | C9H13N | |
| 552 | N-Ethyl m-toluidine | C9H13N | |
| 553 | cis-3,7a-H-cis-5,8-H-3,5-Dimethylpyrrolizidine | C9H17N | |
| 554 | Decahydro trans-quinoline | C9H17N | |
| 555 | 2,2,6,6-Tetramethyl piperidine | C9H19N | |
| 556 | 2-Methyl-quinoline | C10H9N | |
| 557 | 4-Methyl-quinoline | C10H9N | |
| 558 | 6-Methyl-quinoline | C10H9N | |
| 559 | 8-Methyl-quinoline | C10H9N | |
| 560 | 2,4,6-Trimethyl-benzonitrile | C10H11N | |
| 561 | 2,4,6-Trimethylphenyl isocyanide | C10H11N | |
| 562 | N,N-Diethyl aniline | C10H15N | |
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