Chemical identity

Vancomycin EP Impurity L

CAS 79517-31-0 · C66H74Cl2N8O25

01Identity

Identifiers and names for this exact compound. Empty fields are left unassigned.

Lazychem IDLC-30569
PubChem CID162914257
NameVancomycin EP Impurity L
CAS RN79517-31-0
Molecular formulaC66H74Cl2N8O25
Molecular weight1450.2 g/mol
IUPAC name[L-alpha-Asp3]vancomycin B
InChIKeyUHOHFBMFLQATLQ-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 162914257
Two-dimensional chemical structure of Vancomycin EP Impurity L, CAS 79517-31-0
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 12 rings, includes aromatic atoms, includes aliphatic carbon, contains at least one halogen atom. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres18
Ring count12
Secondary amines1
Tertiary amines0
N-methyl amine sites0
SMILESCC1C(C(CC(O1)OC2C(C(C(OC2OC3=C4C=C5C=C3OC6=C(C=C(C=C6)C(C(C(=O)NC(C(=O)NC5C(=O)NC7C8=CC(=C(C=C8)O)C9=C(C=C(C=C9O)O)C(NC(=O)C(C(C1=CC(=C(O4)C=C1)Cl)O)NC7=O)C(=O)O)CC(=O)O)NC(=O)C(CC(C)C)NC)O)Cl)CO)O)O)(C)N)O
InChINot listed
Formula from structureC66H74Cl2N8O25
Molecular weight from structure1450.2 g/mol

03Stereochemistry

The published structure contains 0 defined and 18 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres0Structure assigned
Unassigned centres18Structure unspecified
Assignment statusUnassignedExact published identity
Tetrahedral upper bound≤ 262,144Before symmetry reduction

Published same-connectivity configurations

1 record

These records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

No additional structure-linked configuration with the same connectivity is currently present in the LazyChem dataset.

Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.

04Possible N-nitroso structures

Shown for structural screening only. These candidates are not confirmed impurities, formation predictions or analytical findings.

Matched amine site1 candidate
Chemical structure of Vancomycin EP Impurity L with the matched amine site highlighted in amber
Amber identifies the screened atom and adjacent bonds.
Possible structure candidateUnverified identity
First calculated possible N-nitroso structure derived from Vancomycin EP Impurity L, with the new N-nitroso group highlighted in amber
The new N-N=O atoms and bonds are highlighted. No CAS number or compound name is assigned by this calculation.
Candidate 1Possible N-nitroso structural candidate
Calculated formula
C66H73Cl2N9O26
Candidate SMILES
CC(C)CC(C(=O)NC1C(=O)NC(CC(=O)O)C(=O)NC2C(=O)NC3C(=O)NC(C(=O)NC(C(=O)O)c4cc(O)cc(O)c4-c4cc3ccc4O)C(O)c3ccc(c(Cl)c3)Oc3cc2cc(c3OC2OC(CO)C(O)C(O)C2OC2CC(C)(N)C(O)C(C)O2)Oc2ccc(cc2Cl)C1O)N(C)N=O

Interpretation: A structural alert alone does not establish that a nitrosamine forms. Evaluate nitrite sources, amine reagents, pH, temperature, process sequence, purge and analytical evidence.

05India status for this compound

These results apply only to this exact compound name and CAS number. Confirm the current official instruments before making a regulatory decision.

NDPS / RCSNO EXACT MATCH FOUNDCAS 79517-31-0 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 79517-31-0 has no exact match in the reviewed SCOMET list.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

06Names and relationships

Associated parent compound

VANCOMYCIN

View API and impurity family

Other names

  • Vancomycin EP Impurity L
  • 79517-31-0
  • 23-De(aminocarbonyl)-23-carboxy Vancomycin

Related records from the same parent family

07Documented history

Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.

No dated history available

No verified discovery, first report, occurrence, use or issue event is currently available for this identity.

08Sources