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Methotrexate

CAS No. 59-05-2

Chemical Formula : C20H22N8O5

STD No. 713M
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Methotrexate Impurity 1（Methotrexate EP Impurity A）

CAS No. 945-24-4

Chemical Formula : C7H8N6O

STD No. 7131M
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Methotrexate Impurity 2（Methotrexate EP Impurity B）

CAS No. 54-62-6

Chemical Formula : C19H20N8O5

STD No. 7132M
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Methotrexate Impurity 3（Methotrexate EP Impurity C）

CAS No. 2410-93-7

Chemical Formula : C20H21N7O6

STD No. 7133M
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Methotrexate Impurity 4（Methotrexate EP Impurity D）

CAS No. 5623-18-7

Chemical Formula : C15H14N6O3

STD No. 7134M
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Methotrexate Impurity 5（Methotrexate EP Impurity E）

CAS No. 70844-48-3

Chemical Formula : C30H31ClN14O4

STD No. 7135M
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Methotrexate Impurity 6（Methotrexate EP Impurity F）

CAS No. 51865-79-3

Chemical Formula : C20H22N8O5

STD No. 7136M
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Methotrexate Impurity 7（Methotrexate EP Impurity G）

CAS No. N/A

Chemical Formula : C28H29N9O6

STD No. 7137M
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Methotrexate Impurity 8（Methotrexate EP Impurity H）

CAS No. 67022-39-3

Chemical Formula : C21H24N8O5

STD No. 7138M
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Methotrexate Impurity 9（Methotrexate EP Impurity I）

CAS No. 66147-29-3

Chemical Formula : C21H24N8O5

STD No. 7139M
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Methotrexate Impurity 10（Methotrexate EP Impurity J）

CAS No. 34378-65-9

Chemical Formula : C22H26N8O5

STD No. 71310M
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Methotrexate Impurity 11（Methotrexate EP Impurity K）

CAS No. 4271-30-1

Chemical Formula : C12H14N2O5

STD No. 71311M
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Methotrexate Impurity 12（Methotrexate EP Impurity L）

CAS No. 52980-68-4

Chemical Formula : C13H16N2O5

STD No. 71312M
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Methotrexate Impurity 13

CAS No. 5392-28-9

Chemical Formula : C4H10N6O4S

STD No. 71313M
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Methotrexate-d3

CAS No. 432545-63-6

Chemical Formula : C20H19D3N8O5

STD No. 713MD3
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Methotrexate Impurity 14

CAS No. 71074-44-7

Chemical Formula : C22H27N9O4

STD No. 71314M
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Methotrexate Impurity 12 Zinc

CAS No. N/A

Chemical Formula : C13H14N2O5Zn2

STD No. 71312MZ
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Methotrexate Impurity 15

CAS No. 52853-40-4

Chemical Formula : C7H8Br2N6

STD No. 71315M
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Methotrexate Impurity 16

CAS No. N/A

Chemical Formula : C13H15N3O6

STD No. 71316M
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Methotrexate Impurity 16 Zinc

CAS No. N/A

Chemical Formula : C13H13N3O6Zn2

STD No. 71316MZ
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Methotrexate Impurity 17

CAS No. N/A

Chemical Formula : C4H10N2O

STD No. 71317M
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Methotrexate Impurity 18

CAS No. N/A

Chemical Formula : C32H42N8O15

STD No. 71318M
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