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Cato Research Chemicals Inc.??? ?? ??? ?????.

?? ?:Cato Research Chemicals Inc.
??:020-81960175
???:tianwen.zhan@cato-chem.com
??:China
URL: www.cato-chem.com/
? ?? ?:7735
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Ciprofloxacin EP Impurity C(Enrofloxacin EP Impurity G)???????????103222-12-4C15H16FN3O3
Cefditoren Impurity 242409806-43-3C25H30N6O8S3
Voriconazole Impurity 17（Mixture of Diastereoisomer）188416-35-5C16H13ClF3N5O
5-Demethoxy Coenzyme Q102006296-15-5C58H88O3
Mianserin impurity 1857257-81-5C18H20N2O
Nimodipine Impurity 1474936-69-9C18H20N2O6
Voriconazole Impurity 281307315-02-1C6H5Br2FN2
Metoclopramide Impurity 2455304-05-7C10H11NO4
Azelastine Impurity 20?????????47491-38-3C21H22ClN3O
Gemcitabine Impurity 52174019-90-8C16H15F2N3O5
Voriconazole Impurity 43154335-57-6C12H20O4S
Rivastigmine Impurity 143-???????(??)?????1346242-31-6C10H12N2O4
Paricalcitol Impurity 292-((3R,5R)-3,5-??(tert-?????????)????????)???139356-37-9C20H42O3Si2
Paricalcitol Impurity 31884139-61-0C27H44O3
Furosemide Impurity 451803102-41-1C10H9NO2
Gemcitabine EP Impurity B95058-85-8C9H11F2N3O4
Paricalcitol lmpurity 421186587-53-0C19H32O2
Famotidine Impurity 502-????????-4-????95853-51-3C5H8N4S2
Metronidazole Impurity 22??-???????542-05-2C5H6O5
Raltitrexed112887-68-0C21H22N4O6S
Pioglitazone Aldehyde Impurity114393-97-4C16H17NO2
Levomefolic Acid-13C,d31356019-94-7C20H22D3N7O6
Famotidine Impurity 37503-66-2C3H6O3
Furosemide Impurity 1862574-66-7C7H3Cl3O3S
Raltitrexed Impurity 9132462-57-8C20H20N4O6S
Ribavirin Impurity 51??1,2,4-????-3-???????4928-88-5C4H5N3O2
Paricalcitol Impurity 341715-86-2C27H42O
Gemcitabine Impurity 291-OXO-2-DEOXY-2,2-DIFLUORO-3,4-DIBENZOYLOXY-???122111-02-8C19H14F2O6
Raltitrexed Impurity 71042419-89-5C21H22N4O6S
Rivastigmine Impurity 25????18840-47-6C9H13NO
Mivacurium Chloride Impurity 21104758-47-6C22H29NO5
Cefditoren-d32747915-67-7C19H18N6O5S3
Paricalcitol131918-61-1C27H44O3
Gemcitabine Impurity 28134790-40-2C23H19F2N3O6
Paricalcitol Impurity 2132015-95-3C27H44O3
Paricalcitol Impurity 1995716-67-9C19H34O2
Telmisartan Impurity 33??4'-?????-2-???????114772-34-8C15H14O2
c-di-AMPc-?-AMP54447-84-6C20H24N10O12P2
Mianserin impurity 16140636-22-2C18H20N2O4S
Metoprolol EP Impurity N Oxalate73313-34-5C8H17NO6
Gemcitabine Impurity 273'-???????3',5'-??????1268237-46-2C23H19F2N3O6
Levofloxacin Impurity 40(3S)-10-(4-Ethyl-1-piperazinyl)-9-fluoro-2,3-dihydro-3-Methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylicAcid(??????IMpurity)106939-30-4C19H22FN3O4
Voriconazole Impurity 271702684-04-5C6H6BrFN2
Telmisartan-d71794754-60-1C33H23D7N4O2
Ranitidine-d6 HCl1185238-09-8C13H16D6N4O3S.ClH
Sulfasalazine EP Impurity B?????EP???B1391062-49-9C29H22N8O7S2
Chlorpromazine EP Impurity A HCl316-07-4C17H19ClN2OS.ClH
Ribavirin Impurity 5013035-61-5C13H18O9
Chenodeoxycholic acid methyl???????????3057-04-3C25H42O4
3-Carbamoylpyrazine 1-oxide3-?????????1-????768-36-5C5H5N3O2
Metoclopramide Impurity 2125195-05-5C14H21Cl2N3O2
Promethazine N-β-D-Glucuronide?????N-???????137908-81-7C23H29N2O7S
Promethazine Impurity 9 HCl
Folic Acid Impurity 46 Disodium Salt914800-65-0C20H23N7O7.2Na
Glycochenodeoxycholic Acid Ethyl Ester70779-05-4C28H47NO5
Taurourscholic acid86386-60-9C26H45NO7S
Folic Acid Impurity 296-?????708-75-8C7H7N5O
N-Nitroso Amiodarone EP Impurity B678982-38-2C23H24I2N2O4
Taurolithocholic Acid516-90-5C26H45NO5S
Ursodeoxycholic acid impurity 54????????????57011-24-2C26H38NNaO7S
Tizanidine EP Impurity C1147548-83-1C16H14Cl2N10S2
Ketoprofen Impurity 35108315-48-6C15H14O3
Propofol Impurity 52
Rifampicin Impurity 61416773-22-2C43H58N4O12
Benserazide EP Impurity B Ethanol2472968-83-3C17H21N3O8
Flumazenil Impurity 878755-82-5C14H12FN3O3
N-Nitroso DesloratadineN-??????????1246819-22-6C19H18ClN3O
Desloratadine Citric Amide1797131-43-1C25H25ClN2O6
Cefuroxime Axetil Impurity 1064599-29-7C20H22N4O10S
Glycopyrrolate Impurity 4???????????475468-09-8C19H28NO3.Br
Flurbiprofen Impurity 60??2-(3-????-4-?????)???????78543-07-4C11H12FNO4
Flurbiprofen Impurity 18???(3-????-4-?????)???????78543-06-3C14H16FNO6
Warfarin sodium EP Impurity C(E)-4-??-3-??-2-?1896-62-4C10H10O
Desloratadine Impurity 48119770-61-5C20H21ClN2
Ampicillin Impurity D (Mixture of Diastereomers)1642629-93-3C16H21N3O5S
Venlafaxine N-Oxide1-[2-(?????????)-1-(4-?????)??]??????1094598-37-4C17H27NO3
Venlafaxine EP Impurity D HCl?????????A(10mg)(1-(1-(4-?????)-2-(?????)??)??????????)93413-90-2C17H27NO2
Furosemide Impurity 44
Reserpine Impurity 3131-01-1C32H38N2O8
Glycopyrrolate Impurity 16?????,3-[(????????????????)??]-1,1-???-,?????,[S-(R*,R*)]-201667-20-1
Venlafaxine EP Impurity A HClN,N-???-4-???????????50822-98-5C11H18ClNO
Domperidone Impurity 2252099-72-6C10H10N2O
Indapamide Impurity 19?? ???7719-09-7Cl2OS
Ursodeoxycholic acid impurity 257a-?????-3-??-5b-???4185-00-6C24H38O4
Tauroursodeoxycholic-2,2,3,4,4-d5 Acid1207294-25-4C26H40D5NO6S
Ethyl Ursodeoxycholate69519-36-4C26H44O4
3α-Hydroxy-7-oxocholanoyltaurine3-?????-7-?????????75808-01-4
Dapoxetine Impurity 812415108-74-4C28H28O3
Iopamidol Impurity 172-???-1,3-?????1794-90-7C3H7NO4
Venlafaxine EP Impurity H（Mixture of Diastereomers）D,LN,N-?????-N-(4-??????)????1329795-88-1C24H33NO3
Tizanidine EP Impurity F1147548-85-3C16H11Cl2N9S2
Glipizide Impurity 2751037-31-1C6H6N2O3
Promethazine EP Impurity B???????303-14-0C17H20N2S
Phenylephrine Impurity 61 HBr61186-06-9C9H14BrNO
Ampicillin impurity 6555675-51-9C16H16N2O5S
Propofol Impurity 2984633-54-5C56H84O10
Flurbiprofen Impurity 5542771-82-4C16H13FO4
Naltrexone Impurity 2164643-76-1C21H23NO6
Phenylephrine Impurity 571477-63-0C9H13NO2
Propofol Impurity 54
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