| NO. | Name | CAS No. |
| 241 | 3-(4-morpholinyl)-1-propyne | 5799-76-8 |
| 242 | 2-((prop-2-yn-1-yloxy)Methyl)oxirane | 18180-30-8 |
| 243 | 5-Hexyn-1-aMine | 15252-45-6 |
| 244 | 1-Phenyl-1-butyne | 622-76-4 |
| 245 | 1-Ethynylcyclopentanol | 17356-19-3 |
| 246 | (Triphenylsilyl)acetylene | 6229-00-1 |
| 247 | 4-Pentynoic acid, methyl ester | 21565-82-2 |
| 248 | Ethyl 2-pentynoate | 55314-57-3 |
| 249 | Methyl 2-butynoate | 23326-27-4 |
| 250 | CarbaMic acid, N-4-pentyn-1-yl-, 1,1-diMethylethyl ester | 151978-50-6 |
| 251 | 6-Heptynoic alcohol | 63478-76-2 |
| 252 | 3-(Trimethylsilyl)propargyl alcohol | 5272-36-6 |
| 253 | 4,4-diethoxybut-2-ynal | 74149-25-0 |
| 254 | 3-Chloro-1-phenyl-1-propyne | 3355-31-5 |
| 255 | 3-Butyn-2-one | 1423-60-5 |
| 256 | 4-(Trimethylsilyl)-3-butyn-2-one | 5930-98-3 |
| 257 | ETHYL 6-HEPTYNOATE | 105339-02-4 |
| 258 | 12-Tridecyn-1-ol | 18202-11-4 |
