| Record No. | Name | No. of Entries |
| 101 | Ankorine | 2 |
| 102 | Anolobine | 8 |
| 103 | Anonaine | 16 |
| 104 | Anpec | 1 |
| 105 | Antioquine | 1 |
| 106 | Apocodeine | 2 |
| 107 | Apocodeine hydrochloride | 2 |
| 108 | Apomorphine | 3 |
| 109 | Apomorphine diacetate | 1 |
| 110 | Apomorphine dimer hydrochloride | 1 |
| 111 | Apomorphine hydrochloride | 1 |
| 112 | Apomorphine,bis(trimethylsilyl)- | 1 |
| 113 | Aporphine | 1 |
| 114 | Armepavine | 20 |
| 115 | Aromoline | 1 |
| 116 | Asimilobine | 1 |
| 117 | Asimilobine-2-O-glucoside | 2 |
| 118 | Aspirin | 10 |
| 119 | Assam wood | 1 |
| 120 | Atheroline | 5 |
| 121 | Atheroline,O-ethyl- | 1 |
| 122 | Atherospermidine | 4 |
| 123 | Atracurium | 2 |
| 124 | Atropine | 1 |
| 125 | Backebergine | 2 |