| Ramelteon Amine Impurity | 196597-80-5 | Ax-15523 |
| Ramelteo Impurity A | 326793-94-6 | Ax-15522 |
| Ramelteon R-Isomer | 196597-27-0 | Ax-15521 |
| Recimic Ramelteon | 196597-17-8 | Ax-15520 |
| 1-(2,4-dichlorobenzyl)piperazine | 51619-56-8 | Ax-15519 |
| 1-((4-amino-2-propylpyrimidin-5-yl)methyl)-2-methylpyridin-1-ium bromide | NA | Ax-15518 |
| 1-((4-amino-2-propylpyrimidin-5-yl)methyl)-2-methylpyridin-1-ium chloride | 121-25-5 | Ax-15517 |
| 5-(tert-butoxymethyl)-2-propylpyrimidin-4-amine | NA | Ax-15516 |
| 5-(bromomethyl)-2-methylpyrimidin-4-amine | 25526-81-2 | Ax-15515 |
| 5-(ethoxymethyl)-2-methylpyrimidin-4(3H)-one | 5423-97-2 | Ax-15514 |