| Label | Id | |
|---|---|---|
| Ala-Lys | 132403 | |
| Ala-Lys(1+) | 192470 | |
| Alanyl-Arginine | 172484 | |
| Albidopyrone | 222420 | |
| Albocycline | 182469 | |
| Albothricin | 222466 | |
| Aldehydo-D-altrose | 229244 | |
| Alentemol | 191243 | |
| Allithiamine | 169524 | |
| Allixin | 172466 | |
| Almadioxide | 206624 | |
| Alternanthin | 192924 | |
| Amaurosubresin | 218240 | |
| Aminofurantoin | 169244 | |
| Ampullosporin | 211249 |