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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/
? ?? ?:7765
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Amoxicillin Trimer Impurity174391-69-6C48H57N9O15S3
Clavulanate Potassium EP Impurity A2,5-???????4744-51-8C8H12N2O2
Rosuvastatin EP Impurity F289042-12-2C29H40FN3O6S
Methotrexate EP Impurity G2519848-42-9C28H29N9O6
Rosuvastatin EP Impurity E Calcium salt2226413-61-0C38H46F2N6O9S2
Posaconazole Impurity 17(R,R,R,S)171228-51-6C37H42F2N8O4
Posaconazole Impurity 43357189-95-8C37H40F2N8O6
Posaconazole Impurity 15(S,S,S,S)1246391-73-0C37H42F2N8O4
Posaconazole Impurity 12(S,S,R,R)2243785-97-7C37H42F2N8O4
Rosuvastatin dehydroanaloge2290571-51-4C22H26FN3O5S
Dexamethasone Acid Ethyl Ester2991360-83-7C23H31FO5
Posaconazole Impurity 481902954-03-3C37H42F2N8O5
Silydianin?????29782-68-1C25H22O10
Emedastine EP Impurity D130263-14-8C15H20N4
Upadacitinib Impurity 652460133-49-5C16H20ClNO3
Ticlopidine EP Impurity B6.7-???????[3.2.c]???-4(5H)-?68559-60-4C7H7NOS
Relugolix737789-87-6C29H27F2N7O5S
7-Ethyl Methyl Amino Minocycline32598-29-1C24H29N3O7
α-Hydroxy olopatadine2-?????????????iMpurity1331822-32-2C21H23NO4
Paliperidone relatedcompound D?????N-????761460-08-6C23H27FN4O4
Ramipril EP Impurity B?????????B(20MG)(????ISOPROPYLESTER)295328-72-2C24H34N2O5
Minocycline Impurity 3228698-93-3C22H24N4O8
Levothyroxine Impurity 27N-ForMyl???671235-41-9C16H11I4NO5
Progesterone-d915775-74-3C21H21D9O2
Isoconazole27523-40-6C18H14Cl4N2O
Ketoprofen EP Impurity L (Mixture of Enantiomer)1797984-80-5C19H20O3
Naloxone Hydrochloride EP Impurity D26451-92-3C19H19NO4
Azelastine Impurity 332-((4-?????)???)???53242-76-5C15H11ClO3
Cefditoren Impurity 6N-???-????????878002-84-7C30H36N6O8S3
Tryptophan EP Impurity IHarmane-1,2,3,4-TETRAHYDRO-3-?????5470-37-1C13H14N2O2
Teprenone [mixture of (5E,9E,13E)- and (5Z,9E,13E)- isomers????6809-52-5C23H38O
Praziquantel EP Impurity A54761-87-4C19H18N2O2
Praziquantel EP Impurity C125273-88-3C19H22N2O4
Ceftizoxime Impurity 24929101-91-7C20H19N7O7S3
Peramivir Impurity 43229614-51-1C16H30N4O4
Peramivir Impurity 49 HCl229614-17-9C15H29ClN2O4
Riboflavin 4＇,5＇-Diphosphate86108-25-0C17H22N4O12P2
Riboflavin-4＇-phosphate60697-29-2C17H21N4O9P
Riboflavin EP Impurity A?????1088-56-8C13H12N4O2
Riboflavin 3＇,5＇-Diphosphate?????3',5'-???????86108-26-1C17H22N4O12P2
Pranoprofen Impurity 26ALFA-METHYL-5H-[1]?????[2,3-B]???-7-??????????86618-09-9C17H17NO3
Miconazole EP Impurity F????EP???F27220-35-5C18H15Cl4N3O4
Pranoprofen Impurity 22146330-68-9C15H12ClNO2
Piperacillin Impurity 2164844-70-8C23H29N5O8S
Praziquantel EP Impurity B125273-86-1C19H22N2O2
Cilastatin EP Impurity E1174657-07-8C10H17NO5S
Urapidil Impurity 30???(2-?????)?? ?????????817-09-4C6H13Cl4N
Valaciclovir EP Impurity F(p-toluenesulfonic acid)86150-61-0C14H23NO6S
Posaconazole Impurity 401370190-94-5C35H40F2N8O4
Vitamin K1 Impurity 3119274-66-9C31H46O2
Alendronic Acid Impurity 32-?????????73858-59-0C4H10NO3P
Morinidazole Impurity 121782143-94-5C11H18N4O4
Tenofovir Alafenamide Impurity 21883563-86-7C21H36N7O6P
Ceftizoxime Impurity 23929101-93-9C19H18N8O7S3
Topiramate Impurity 24,5-??????????????106881-41-8C9H17NO8S
N-Desmethyl Riociguat625115-52-8C19H17FN8O2
Trazodone EP Impurity B????????62337-66-0C19H23N5O
Tiotropium Bromide EP Impurity H (Mixture of Enantiomers)1044148-31-3C9H16BrNO2
Phloroglucinol Impurity 3283-30-7C7H6O5
Vitamin A Impurity 813828-13-2C44H64O4
Diltiazem EP Impurity A HCl103532-27-0C22H27ClN2O4S
Terbinafine Hydrochloride EP Impurity F HCl926281-74-5C21H25N
Spironolactone EP Impurity E33784-05-3C24H32O4S
Propafenone EP Impurity G????????G1346603-80-2C39H45NO6
Terbinafine EP Impurity D HCl877265-33-3C22H28ClN
Propafenone EP Impurity B HCl??????????B(50mg)((2E)-1-[2-[(2RS)-2-?????-3-(??????)????]??]-3-?????-2-?-1-?)88308-22-9C21H25NO3
Pregabalin Impurity 135,6-??????????1136478-30-2C8H15NO2
Roxithromycin EP Impurity G(9E)-???????9-[O-[[(2-??????)???]??]??]425365-64-6C42H78N2O16
Tacrolimus EP Impurity F1393890-33-9C44H69NO12
Tacrolimus Monohydrate??????109581-93-3C44H71NO13
FK-506-13C,D2 (Major) (Tacrolimus)1356841-89-8C44H67D2NO12
Cefaclor EP Impurity E188915-50-6C14H14ClN3O4S
Vitamin E Impurity 11(Mixture of Z and E isomers)2734344-00-2C32H54O3
Urapidil Impurity 5413300-33-9C8H13N3O3
Doxycycline-d3 HCl
Thiamine Nitrate EP Impurity G????????1037-29-2C14H20Cl2N4O2S
Thiamine /Vitamin B1 Impurity 184-???-5-(???????)-2-??????1886-34-6C7H10N4O
Thiamine /Vitamin B1 Impurity 194- ??? -2- ?? ?? ?? -5- ??95-02-3C6H10N4
Epinephrine Impurity 654-[1-????-2-(?????)??]-o-????672-73-1C9H11NO3
Ubidecarenone Impurity 2(Coenzyme Q10)65085-29-2C59H90O4
Upadacitinib Impurity 481869118-25-1C15H17NO4
Urapidil Impurity 392568071-92-9C21H29N5O5
Roxithromycin EP Impurity FN-??????????118267-18-8C40H74N2O15
Perindopril EP Impurity I（Enantiomer Mixture）tert-Butylamine Salt
Varenicline Impurity 132755871-02-2C13H12N4O
Benserazide Impurity 31437988-46-0C7H8O4
N-Nitroso Phenylephrine78658-64-7C9H12N2O3
Roxithromycin EP Impurity H425365-65-7C41H76N2O14
Roxithromycin EP Impurity I TFA salt
Ornidazole impurity 11100750-18-2
Moxidectin EP Impurity E2482741-71-7C37H53NO8
Isavuconazole Impurity 72192225-36-8C10H9NO2
N-Nitroso Bisoprolol2820170-76-9C18H30N2O5
Riboflavin-3＇-phosphate80400-93-7C17H21N4O9P
Budesonide Impurity 28 (Mixture of Diastereomers)2408495-96-3C29H40O7
Roxithromycin EP Impurity J134834-12-1C40H73ClN2O14
Baricitinib-d51564241-79-7C16H17N7O2S
(5E,9E,13Z)-Teprenone3879-23-0C23H38O
Roxithromycin EP Impurity E1460313-66-9C40H74N2O15
Cefuroxime Open-ring Impurity 441177709-12-4C15H15N3O7S
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