Chemical identity

Budesonide (22R)-Isomer/ Dexbudesonide/ Budesonide Epimer B/ R-Budesonide

CAS 51372-29-3 · C25H34O6

01Identity

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

Lazychem IDLC-08851
PubChem CID40000
NameBudesonide (22R)-Isomer/ Dexbudesonide/ Budesonide Epimer B/ R-Budesonide
CAS RN51372-29-3
Molecular formulaC25H34O6
Molecular weight430.53 g/mol
IUPAC name(11β,16α)-16,17-[(1R)-Butylidenebis(oxy)]-11,21-dihydroxypregna-1,4-diene-3,20-dione
InChIKeyVOVIALXJUBGFJZ-VXKMTNQYSA-N

02Structure identifiers

2D structurePubChem CID 40000
Two-dimensional chemical structure of Budesonide (22R)-Isomer/ Dexbudesonide/ Budesonide Epimer B/ R-Budesonide, CAS 51372-29-3
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 5 rings, includes aliphatic carbon, has 9 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres9
Unassigned stereocentres0
Ring count5
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCCC[C@@H]1O[C@@H]2C[C@H]3[C@@H]4CCC5=CC(=O)C=C[C@@]5([C@H]4[C@H](C[C@@]3([C@@]2(O1)C(=O)CO)C)O)C
InChINot listed
Formula from structureC25H34O6
Molecular weight from structure430.53 g/mol

03Stereochemistry

The published structure contains 9 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres9Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 512Before symmetry reduction

Published same-connectivity configurations

2 records

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.

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.

04India 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 51372-29-3 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 51372-29-3 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.

05Names and relationships

Associated parent compound

Budesonide

View API and impurity family

Other names

  • Budesonide (22R)-Isomer
  • Dexbudesonide
  • R-Budesonide
  • Pregna-1,4-diene-3,20-dione,16,17-[(1R)-butylidenebis(oxy)]-11,21-dihydroxy-, (11b,16a)-
  • (4aR,4bS,5S,6aS,6bS,8R,9aR,10aS,10bS)-5-hydroxy-6b-(hydroxyacetyl)-4a,6a-dimethyl-8-propyl-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-2-one
  • Budesonide Epimer B

Related records from the same parent family

06Documented 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.

07Sources