| N-Methyl amine chloro impurity of levetiracetam | NA | Ax-16369 |
| S-Levetiracetam Hydroxybutyramide Analog | 1868118-63-1 | Ax-16368 |
| 2,2,4,4-tetrabromocyclobutan-1-one | 1193-44-8 | Ax-16281 |
| 2,4-dibromocyclobutan-1-one | 2867-23-4 | Ax-16280 |
| 2,2-dibromocyclobutan-1-one | 2885-97-4 | Ax-16279 |
| spiro[3.4]octan-1-one | 37609-31-7 | Ax-16278 |
| oxetane-3,3-dicarboxylic acid | 1426312-58-4 | Ax-16277 |
| diethyl oxetane-3,3-dicarboxylate | 1823841-06-0 | Ax-16276 |
| 3-nitrobenzothioamide | 70102-34-0 | Ax-16273 |
| ethyl 1-cyanocyclobutane-1-carboxylate | 28246-87-9 | Ax-16272 |