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Tramadol EP Impurity A

CAS No : 73806-49-2 ; 152538-36-8 (free base)

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Tramadol EP Impurity B

CAS No : 66170-32-9 ; 73825-64-6 (free base)

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Tramadol EP Impurity C

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Tramadol EP Impurity D

CAS No : 73986-53-5 ; 16412-54-7 (HCl salt)

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