Betamethasone IHRS

CAS No 378-44-9

IUPAC  9-Fluoro-11β,17,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione

Catalogue No. PACE-B07001

Molecular Formula C₂₂H₂₉FO₅

Molecular Weight 392.5 g/mol

Synonyms -

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Betamethasone EP Impurity A

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IUPAC 9-Fluoro-11β,17,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione

Catalogue No. PACE-B07002

Molecular Formula C₂₂H₂₉FO₅

Molecular Weight 392.5 g/mol

Synonyms Dexamethasone

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Betamethasone EP Impurity B

CAS No 25122-41-2

IUPAC  21-Chloro-9-fluoro-11β,17-dihydroxy-16β-methylpregna-1,4-diene-3,20-dione

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Molecular Formula C₂₂H₂₈ClFO₄

Molecular Weight 410.9 g/mol

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Betamethasone EP Impurity C

CAS No 13504-15-9

IUPAC 17,21-Dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione

Catalogue No. PACE-B07004

Molecular Formula C₂₂H₂₈O₄

Molecular Weight 356.5 g/mol

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IUPAC 9-Fluoro-11β,17-dihydroxy-16β-methyl-3,20-dioxopregna-1,4-dien-21-yl ethoxycarboxylate

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Molecular Formula C₂₅H₃₃FO₇

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