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| No. | CAS No. | Product Name | Molecular Formula |
| H-051587 | 1228675-27-1 | 1-benzyl 4-(tert-butyl) 2,3-dihydropyrazine-1,4-dicarboxylate | C17H22N2O4 |
| H-051399 | 1029720-98-6 | ethyl 4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine-2-carboxylate | C9H14ClN3O2 |
| H-032741 | 1159825-34-9 | tert-butyl octahydro-2H-pyrazino[1,2-a]pyrazine-2-carboxylate | C12H23N3O2 |
| H-028958 | 1512466-81-7 | 2-(4-methoxyphenyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine | |
| H-028940 | 1196154-97-8 | 2-(trifluoromethyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine | |
| H-027068 | 959238-29-0 | 3-(Trifluoromethyl)-5,6,7,8-tetrahydroimidazo-[1,5-a]pyrazine | C7H8F3N3 |
| H-045847 | 2101206-35-1 | 2-ethyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine hydrochloride | C8H14ClN3 |
| H-032636 | 1174068-78-0 | tert-butyl 3,4-dihydropyrrolo[1,2-a]pyrazine-2(1H)-carboxylate | C12H18N2O2 |
| H-017038 | 374795-76-3 | tert-Butyl 5,6-dihydroimidazo[1,5-a]pyrazine-7(8H)-carboxylate | C11H17N3O2 |
| H-008899 | 954239-19-1 | 3-Bromo-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine hydrochloride | C6H8N3Br.HCl |