Chemical identity

N-Desmethyl Doxycycline

CAS 86271-83-2 · C21H22N2O8

01Identity

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

Lazychem IDLC-21171
PubChem CID54692977
NameN-Desmethyl Doxycycline
CAS RN86271-83-2
Molecular formulaC21H22N2O8
Molecular weight430.41 g/mol
IUPAC name[4S-(4α,4aα,5α,5aα,6α,12aα)]-1,4,4a,5,5a,6,11,12a-Octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-4-(methylamino)-1,11-dioxo-2-naphthacenecarboxamide
InChIKeyRNNLTLVVHHDBRY-BTGWETQASA-N

02Structure identifiers

2D structurePubChem CID 54692977
Two-dimensional chemical structure of N-Desmethyl Doxycycline, CAS 86271-83-2
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 4 rings, includes aromatic atoms, includes aliphatic carbon, has 6 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres6
Unassigned stereocentres0
Ring count4
Secondary amines1
Tertiary amines0
N-methyl amine sites0
SMILESC[C@@H]1[C@H]2[C@@H]([C@H]3[C@@H](C(=O)C(=C([C@]3(C(=O)C2=C(C4=C1C=CC=C4O)O)O)O)C(=O)N)NC)O
InChINot listed
Formula from structureC21H22N2O8
Molecular weight from structure430.41 g/mol

03Stereochemistry

The published structure contains 6 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres6Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 64Before 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 N-Desmethyl Doxycycline 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 N-Desmethyl Doxycycline, 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
C21H21N3O9
Candidate SMILES
C[C@H]1c2cccc(O)c2C(O)=C2C(=O)[C@]3(O)C(O)=C(C(N)=O)C(=O)[C@@H](N(C)N=O)[C@@H]3[C@@H](O)[C@@H]21

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 86271-83-2 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 86271-83-2 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

Doxycycline

View API and impurity family

Other names

  • N-Desmethyl Doxycycline
  • 86271-83-2
  • (2Z,4S,4aR,5S,5aR,6R,12aS)-2-(amino-hydroxy-methylidene)-5,10,11,12a-tetrahydroxy-6-methyl-4-methylamino-4a,5,5a,6-tetrahydro-4H-tetracene-1,3,12-trione
  • (4S,4aR,5S,5aR,6R,12aR)-1,5,10,11,12a-pentahydroxy-6-methyl-4-(methylamino)-3,12-dioxo-4a,5,5a,6-tetrahydro-4H-tetracene-2-carboxamide
  • [4S-(4alpha,4aalpha,5alpha,5aalpha,6alpha,12aalpha)]-1,4,4a,5,5a,6,11,12a-Octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-4-(methylamino)-1,11-dioxo-2-naphthacenecarboxamide
  • Doxycycline Hyclate Impurity 10
  • 2-Naphthacenecarboxamide, 1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-4-(methylamino)-1,11-dioxo-, (4S-(4alpha,4aalpha,5alpha,5aalpha,6alpha,12aalpha))-
  • (2Z,4S,4aR,5S,5aR,6R,12aS)-2-[amino(hydroxy)methylene]-5,10,11,12a-tetrahydroxy-6-methyl-4-(methylamino)-4a,5,5a,6-tetrahydro-4H-tetracene-1,3,12-trione
  • (4S,4aR,5S,5aR,6R,12aS)-3,5,10,12,12a-pentahydroxy-6-methyl-4-(methylamino)-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide

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