| NO. | Name | CAS No. |
| 41 | 4,4 '- dihydroxybenzophenone | 611-99-4 |
| 42 | P-aminothiophenol | 1193-02-8 |
| 43 | 4,4 'diaminodiphenyl sulfide | 139-65-1 |
| 44 | Phenyl sulfide | 139-66-2 |
| 45 | Diphenyl sulfoxide | 945-51-7 |
| 46 | dibenzothiophene | 132-65-0 |
| 47 | 2-acetylthiophene | 88-15-3 |
| 48 | 9-Thioketone | 492-22-8 |
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