Chemical identity

28-epi-Rapamycin / (18S)-Sirolimus

CAS 253431-35-5 · C51H79NO13

01Identity

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

Lazychem IDLC-04359
PubChem CID131668123
Name28-epi-Rapamycin / (18S)-Sirolimus
CAS RN253431-35-5
Molecular formulaC51H79NO13
Molecular weight914.20 g/mol
IUPAC name28-epi-Rapamycin
InChIKeyQFJCIRLUMZQUOT-OGLZFCPISA-N

02Structure identifiers

2D structurePubChem CID 131668123
Two-dimensional chemical structure of 28-epi-Rapamycin / (18S)-Sirolimus, CAS 253431-35-5
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 4 rings, includes aliphatic carbon, has 15 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres15
Unassigned stereocentres0
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@@H]1CC[C@H]2C[C@@H](C(=CC=CC=C[C@H](C[C@H](C(=O)[C@@H]([C@H](C(=C[C@H](C(=O)C[C@H](OC(=O)[C@@H]3CCCCN3C(=O)C(=O)[C@@]1(O2)O)[C@H](C)C[C@@H]4CC[C@H]([C@@H](C4)OC)O)C)C)O)OC)C)C)C)OC
InChINot listed
Formula from structureC51H79NO13
Molecular weight from structure914.20 g/mol

03Stereochemistry

The published structure contains 15 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres15Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 32,768Before symmetry reduction

Published same-connectivity configurations

5 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 253431-35-5 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 253431-35-5 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

Rapamycin / Sirolimus

View API and impurity family

Other names

  • 28-epi-Rapamycin
  • (18S)-Sirolimus

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