| Label | Id | |
|---|---|---|
| aminobutanal | 22497 | |
| aminophenazone | 160246 | |
| amitriptylinoxide | 135224 | |
| angelitriol | 132402 | |
| anilide | 13248 | |
| anthoxanthin | 192499 | |
| anticoagulant | 50249 | |
| antidote | 50247 | |
| antimonate(2-) | 36924 | |
| arabidiol | 62417 | |
| arsenite(1-) | 29242 | |
| arsenite(2-) | 29243 | |
| ascr#13(1-) | 139624 | |
| asenapine(1+) | 71249 | |
| atazanavir | 37924 |