| NO. | Name | CAS No. |
FEMA |
| 41 | 2-Acetyl pyridine | 1122-62-9 |
3251 |
| 42 | 2-Acetyl pyrrole | 1072-83-9 |
3202 |
| 43 | 2-Acetyl thiazole | 24295-03-2 |
3328 |
| 44 | 2-Acetyl-1-methylpyrrole | 932-16-1 |
3184 |
| 45 | 2-Acetyl-2-thiazoline | 29926-41-8 |
3817 |
| 46 | 2-Acetyl-3-ethylpyrazine | 32974-92-8 |
3250 |
| 47 | 2-Acetyl-3-methylpyrazine | 23787-80-6 |
3964 |
| 48 | 2-Acetyl-5-methylfuran | 1193-79-9 |
3609 |
| 49 | 2-Acetylfuran | 1192-62-7 |
3163 |
| 50 | 2-Acetylthiophene | 88-15-3 |
|
| 51 | 2-Amylfuran | 3777-69-3 |
3317 |
| 52 | 2-Butyl furan | 4466-24-4 |
4081 |
| 53 | 2-Ethyl furan | 3208-16-0 |
3673 |
| 54 | 2-Ethyl-3(5or6)-dimethyl pyrazine | 13925-07-0 |
3149 |
| 55 | 2-Ethyl-3-methylpyrazine | 15707-23-0 |
3155 |
| 56 | 2-Ethyl-4-hydroxy-5-methyl-3(2h)-furanone | 27538-09-6 |
3623 |
| 57 | 2-Ethyl-4-methylthiazole | 15679-12-6 |
3680 |
| 58 | 2-Ethyl-5-methylpyrazine | 13360-64-0 |
3154 |
| 59 | 2-Ethylpyrazine | 13925-00-3 |
3281 |
| 60 | 2-Isobutyl-3-methyl pyrazine | 13925-06-9 |
3133 |