Chemical identity

Rapamycin Impurity 18

CAS not listed · C51H77NO12

01Identity

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

Lazychem IDLC-26776
PubChem CID10440757
NameRapamycin Impurity 18
CAS RNNot listed
Molecular formulaC51H77NO12
Molecular weight896.17 g/mol
IUPAC name(4R,7S,9a'S)-7-((2S,3E,5E,7E,9S,11R,13R,14R,15E,17R,19E,21R)-14-hydroxy-22-((1S,3R,4R)-4-hydroxy-3-methoxycyclohexyl)-2,13-dimethoxy-3,9,11,15,17,21-hexamethyl-12,18-dioxodocosa-3,5,7,15,19-pentaen-1-yl)-4-methyltetrahydro-1'H-spiro[oxepane-2,3'-pyrido[2,1-c][1,4]oxazine]-1',3,4'(6'H)-trione
InChIKeyJHAUJRJLNJIMGW-FMGIDYITSA-N

02Structure identifiers

2D structurePubChem CID 10440757
Two-dimensional chemical structure of Rapamycin Impurity 18
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 13 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres13
Unassigned stereocentres1
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@@H]1CC[C@H](OC2(C1=O)C(=O)N3CCCC[C@H]3C(=O)O2)C[C@@H](/C(=C/C=C/C=C/[C@@H](C)C[C@@H](C)C(=O)[C@@H]([C@@H](/C(=C/[C@@H](C)C(=O)/C=C/[C@H](C)C[C@@H]4CC[C@H]([C@@H](C4)OC)O)/C)O)OC)/C)OC
InChINot listed
Formula from structureC51H77NO12
Molecular weight from structure896.17 g/mol

03Stereochemistry

The published structure contains 13 defined and 1 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres13Structure assigned
Unassigned centres1Structure unspecified
Assignment statusPartially assignedExact published identity
Tetrahedral upper bound≤ 16,384Before 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.

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 FOUNDNo CAS number is available for an exact comparison.
SCOMETNO EXACT REVIEWED CAS MATCHNo CAS number is available for an exact comparison.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

Rapamycin

View API and impurity family

Other names

No synonyms are listed.

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