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91700-98-0Vancomycin EP Impurity A

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Catalogue No.:	VE006683
CAS No.:	91700-98-0
Mol. Formula:	C65H73Cl2N9O24
Mol. Weight:	1433.23 g/mol

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Additional information on CAS 91700-98-0

Parent drug

Vancomycin

IUPAC Name

N-Desmethyl Vancomycin B

Pharmacopoeial Synonyms

N/A

Other Synonyms

N-Desmethyl Vancomycin; N-Desmethyl Vancomycin B; Vancomycin N-Desmethyl Metabolite

Smile

OC1=CC([C@@]([H])(C(O)=O)NC([C@]([H])([C@]([H])(O)C2=CC(Cl)=C(OC3=C(O[C@@H]4O[C@@H]([C@@H](O)[C@H](O)[C@H]4O[C@@H]5O[C@@H](C)[C@@H](O)[C@@](C)(N)C5)CO)C(OC6=C(Cl)C=C([C@]7(O)[H])C=C6)=CC8=C3)C=C2)NC([C@@]([H])9NC([C@]8([H])NC([C@](NC([C@]7([H])NC([C@@](N[H])([H])CC(C)C)=O)=O)([H])CC(N)=O)=O)=O)=O)=O)=C(C=CC9=CC=CO)C(O)=C1

InChI

InChI=1S/C65H73Cl2N9O24/c1-5-22(2)44(69)58(88)75-48-50(82)25-7-10-36(31(66)13-25)96-38-15-27-16-39(54(38)100-64-55(53(85)52(84)40(21-77)98-64)99-42-20-65(4,70)56(86)23(3)95-42)97-37-11-8-26(14-32(37)67)51(83)49-62(92)74-47(63(93)94)30-17-28(78)18-35(80)43(30)29-12-24(6-9-34(29)79)45(59(89)76-49)73-60(90)46(27)72-57(87)33(19-41(68)81)71-61(48)91/h6-18,22-23,33,40,42,44-53,55-56,64,77-80,82-86H,5,19-21,69-70H2,1-4H3,(H2,68,81)(H,71,91)(H,72,87)(H,73,90)(H,74,92)(H,75,88)(H,76,89)(H,93,94)/t22?,23-,33-,40+,42-,44+,45+,46+,47-,48+,49-,50+,51+,52+,53-,55+,56+,64-,65-/m0/s1

Shipping Condition

Ambient Temperature

Description

Vancomycin EP Impurity A, also designated N-Desmethyl Vancomycin, N-Desmethyl Vancomycin B, or Vancomycin N-Desmethyl Metabolite, is the mono-demethylated analogue of the glycopeptide antibiotic vancomycin. With CAS 91700-98-0, molecular formula C65H73Cl2N9O24, and molecular weight 1433.23 g/mol, it represents a structurally related process or biotransformation impurity arising from oxidative or enzymatic N-demethylation at a terminal dimethylamino functionality. Its characterization typically requires high-resolution LC-MS/MS, LC-HRMS, and chromatographic separation by UPLC with UV or MS detection, because minor mass differences and extensive polarity hinder conventional assays. In regulatory impurity profiling, it is assessed as a specified related substance rather than a class-wide mutagenic concern.