| 1 | Butoic acid |
| 2 | Ethylacetic acid |
| 3 | Butanoic acid |
| 4 | Acide butyrique |
| 5 | N-butanoic acid |
| 6 | Buttersaeure |
| 7 | Butanic acid |
| 8 | Propylformic acid |
| 9 | 1-butyric acid |
| 10 | Acide butanoique |
| 11 | N-butyric acid |
| 12 | 1-propanecarboxylic acid |
| 13 | 1-butanoic acid |
| 14 | Propanecarboxylic acid |
| 15 | C4:0 |
| 16 | 4:0 |
| 17 | Ch3-[ch2]2-cooh |
| 18 | Butanoate |