Budesonide API | 51333-22-3

01API identity and structure

2D structure: Budesonide, CAS 51333-22-3 — Structure of Budesonide (CAS 51333-22-3). LazyChem record. Source identity: PubChem CID 5281004. Confirm the identifiers before analytical use.Download structure image

API / medicine name	Budesonide
CAS RN	51333-22-3
PubChem CID	5281004
Molecular formula	C25H34O
Molecular weight	430.53 g/mol
IUPAC name	(RS)-11b,16a,17,21-Tetrahydroxypregna-1,4-diene-3,20-dione cyclic 16,17-acetal with butyraldehyde
Defined stereocentres	8
Unassigned stereocentres	1

SMILES	CCCC1O[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
InChI	Not listed
InChIKey	VOVIALXJUBGFJZ-KWVAZRHASA-N

02Stereochemistry

The published structure contains 8 defined and 1 unassigned tetrahedral stereocentres. The exact wedge-and-dash depiction is shown above.

Defined stereocentres82D structure

Unassigned stereocentres12D structure

Assignment statusPartially assignedExact published identity

Tetrahedral upper bound≤ 512Before 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.

Budesonide

CAS 51333-22-3

VOVIALXJUBGFJZ-KWVAZRHASA-N

Current configuration

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.

03Structural nitrosamine screen

Record-level resultNo candidate is published

No record-level structural candidate is currently published for this identity.

This result does not predict manufacturing conditions, formation, analytical findings or absence of risk. A process-specific assessment is required.

04India status for this compound

The result below applies only to this exact compound identity and CAS number.

NDPS / RCS	NOT FOUND IN REVIEWED ENTRIES	No exact reviewed identity entry was found. Generic, class, analogue, salt and isomer provisions were not evaluated. Confirm the current official schedule before a regulatory decision.
SCOMET	NOT FOUND IN REVIEWED CAS ENTRIES	CAS 51333-22-3 was not found in the reviewed exact-CAS mapping. Generic and analogue entries were not evaluated.

Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · source version 1985-09-16
Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · source version 2026-03-11
Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · source version 2024-09-02

Records whose supplied identity data explicitly associates them with Budesonide. Each link opens the exact chemical identity page. A PubChem impurity label is not treated as an official pharmacopoeial designation unless an exact reviewed source states it.

2D structure: (16a)-21-(Acetyloxy)-16,17-dihydroxypregna-1,4-diene-3,11,20-trione, CAS 3949-79-9

(8R,9S,10R,11S,13S,16R,17S)-11,16,17-Trihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-6,7,8,9,10,11,12,13,16,17-decahydro-3H-cyclopenta[a]phenanthren-3-one

131918-73-5

2D structure: [2,1-b]Furan-4,9(2H,6aH)-dione Prednisolone, CAS 77017-17-5

06Sources

S01
PubChem compound record, CID 5281004
Structure, identifiers and machine-readable properties for the API identity.
S02
NCBI website and molecular data policies
Reuse policy for NCBI molecular data. Vendor descriptions and contributed narrative text are not reproduced.
S03
Lazychem chemical records
Parent-family links use the supplied parent identity.