| Structure | Chemical Name | CAS | MF | 
|  | Imatinib impurity 31 | 1356565-47-3 | C17H17N7 | 
|  | LCZ696(valsartan + sacubitril) impurity 33 |  |  | 
|  | Lenvatinib Impurity 26 |  |  | 
|  | Ozagrel impurity C |  |  | 
|  | Regorafenib Impurity 24 |  |  | 
|  | Regorafenib Impurity 32 |  |  | 
|  | Sitafloxacin Impurity ZZ-A-01 |  |  | 
|  | Solifenacin impurity 18 | 1243274-83-0 | C14H17NO3 | 
|  | Tofacitinib Impurity 87 |  |  | 
|  | Tofacitinib Impurity 92 |  |  | 
|  | Amlodipine EP Impurity K |  | C26H31ClN2O8S | 
|  | Febuxostat Impurity 49 |  |  | 
|  | Budesonide Impurity 6 | 131918-73-5 | C21H26O6 | 
|  | Timolol Impurity 1 | 75014-25-4 | C13H24N4O5S | 
|  | Telmisartan EP-J | 885045-90-9 | C33H29ClN4O2 | 
|  | Pitavastatin Impurity 29 | 148516-15-8 | C25H20FNO2 | 
|  | Rosuvastatin Related Compound 6 | 521973-99-9 | C13H23ClO4 | 
|  | Medetomidine impurity | 2250243-44-6 | C20H22N2O | 
|  | Linagliptin Impurity 51 |  |  | 
|  | Carfilzomib Impurity YGF |  |  | 
|  | Pitavastatin Impurity 45 | 1258947-29-3 | C29H32FNO4 | 
|  | Irinotecan Impurity L |  |  | 
|  | Irinotecan Impurity H |  |  | 
|  | LCZ696(valsartan + sacubitril) impurity 27 |  |  | 
|  | Caspofungin Impurity EJT2 |  |  | 
|  | Tofacitinib Impurity 100 |  |  | 
|  | Afatinib impurity 37 |  |  | 
|  | Vildagliptin Impurity 36 |  |  | 
|  | Butyphthalide impurity 52 |  |  | 
|  | Tofacitinib Impurity 102 | 1615709-90-4 | C14H17ClN2 | 
|  | Pralatrexate Impurity 12 | 1451250-74-0 | C23H23N7O5 | 
|  | Pralatrexate Impurity 17 |  |  | 
|  | Pitavastatin Impurity 49 |  |  | 
|  | Pitavastatin Impurity 55 |  |  | 
|  | Lenvatinib Impurity 40 |  |  | 
|  | Tazobactam Impurity 11 |  |  | 
|  | Crisaborole Impurity 2 |  |  | 
|  | Canagliflozin Impurity 58 |  |  | 
|  | Canagliflozin Impurity 63 |  |  | 
|  | Levetiracetam Impurity 23 |  |  | 
|  | Selexipag Impurity 4 |  |  | 
|  | Levosimendan Impurity 10 | 134678-47-0 | C11H12N2O2 | 
|  | Cabozantinib impurity I |  |  | 
|  | Rotigotine Impurity 2 |  |  | 
|  | Rotigotine Impurity 9 |  |  | 
|  | Olprinone Impurity 5 |  |  | 
|  | Vitamin B5 Impurity 1 | 897045-90-8 | C12H22N2O6 | 
|  | Cilastatin Impurity 5 |  |  | 
|  | (R)-3-(4-(2-chloro-5-iodobenzyl)phenoxy)tetrahydrofuran | 2194590-02-6 | C17H16ClIO2 | 
|  | Sitagliptin Impurity 69 | 2172430-88-3 | C15H16F3NO4 | 
|  | Trimetazidine Impurity 8 |  |  | 
|  | MeropeneM iMpurity 5 |  |  | 
|  | Perindopril IMpurity 6 |  |  | 
|  | Oseltamivir Impurity 48 | 651324-04-8 | C18H33NO4 | 
|  | Tamsulosin impurity 5 |  | C20H28N2O5S | 
|  | Flucloxacillin Impurity 5 |  |  | 
|  | Nitrendipine iMpurity G |  |  | 
| ![(S)-N-(5-((S)-2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)-3-hydroxypyrrolidine-1-carboxamide](../cas/20200401/gif/cb84905123.gif) | (S)-N-(5-((S)-2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)-3-hydroxypyrrolidine-1-carboxamide | 2409589-59-7 | C21H22F2N6O2 | 
|  | Afatinib Impurity 53 |  |  | 
|  | Afatinib Impurity 68 |  |  | 
|  | Empagliflozin Impurity 61 |  |  | 
|  | Ipragliflozin Impurity 3 |  |  | 
|  | Isavuconazole Impurity 30 |  |  | 
|  | Levetiracetam Impurity 27 |  |  | 
|  | Linagliptin Impurity 58 |  |  | 
|  | Oseltamivir Impurity 33 |  |  | 
|  | Oseltamivir Impurity 49 |  |  | 
|  | Palbociclib Impurity 52 |  |  | 
|  | Palbociclib Impurity 37 |  |  | 
|  | Pazufloxacin Impurity 16 | 165071-10-3 | C14H10FNO6 | 
|  | Pimecrolimus Impurity 4 |  |  | 
|  | Posaconazole Impurity 73 |  |  | 
|  | Rosuvastatin Impurity 90 | 2226413-62-1 | C38H44F2N6O8S2 | 
|  | Tofacitinib Impurity 110 |  |  | 
|  | Tofacitinib Impurity 115 |  |  | 
|  | Trelagliptin Impurity 27 |  |  | 
|  | Vildagliptin Impurity 30 | 918830-94-1 | C10H17NO2 | 
| ![N-methyl-N-((3R,4R)-4-methylpiperidin-3-yl)-7H-pyrrolo[2,3-d] pyrimidin-2-amine](../cas/20200401/gif/cb84908513.gif) | N-methyl-N-((3R,4R)-4-methylpiperidin-3-yl)-7H-pyrrolo[2,3-d] pyrimidin-2-amine |  | C13H19N5 | 
|  | Tolvaptan Impurity 6 | 1432725-24-0 | C18H19ClN2O2 | 
|  | Esmolol impurity B |  |  | 
|  | Esmolol impurity F |  |  | 
|  | Diquafosol Impurity E |  |  | 
|  | Bortezomib Impurity 39 |  |  | 
|  | Agomelatine Impurity 1 |  |  | 
|  | Sunitinib Impurity 5 |  |  | 
|  | Silodosin Impurity 6 |  |  | 
|  | Erlotinib Impurity 19 |  |  | 
|  | Ticagrelor Impurity 40 |  |  | 
|  | Moxifloxacin Impurity 12 |  |  | 
|  | Cabozantinib Impurity 4 |  |  | 
|  | Lenvatinib Impurity 35 |  |  | 
|  | Febuxostat Impurity 58 |  |  | 
|  | Cefodizime Impurity B |  |  | 
|  | Cefodizime Impurity D |  |  | 
|  | Penicillin Impurity B |  |  | 
| ![4,4'-(1H-1,2,4-Triazol-1-ylmethylene)bis[benzoic acid]](../cas/20200401/gif/1644566-39-1.gif) | 4,4'-(1H-1,2,4-Triazol-1-ylmethylene)bis[benzoic acid] | 1644566-39-1 | C17H13N3O4 | 
|  | Cefminox Sodium impurity B |  |  | 
|  | Cefotiam Impurity B |  |  | 
|  | pranoprofen impurity 11 | 52549-44-7 | C15H13NO4 | 
|  | Atorvastatin Calcium Hydrate impurity 32 | 2088732-01-6 | C14H27NO4 |