Chemical identity

Erythromycin EP Impurity K

CAS 33442-56-7 · C36H65NO12

01Identity

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

Lazychem IDLC-14375
PubChem CID5483653
NameErythromycin EP Impurity K
CAS RN33442-56-7
Molecular formulaC36H65NO12
Molecular weight703.91 g/mol
IUPAC name(3R,4S,5S,6R,7R,9R,11R,12S,13R,14R)-4-[(2,6-dideoxy-3-C-methyl-α-L-ribo-hexopyranosyl)oxy]-14-ethyl-7,12-dihydroxy-3,5,7,9,11,13-hexamethyl-6-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]oxacyclotetradecane-2,10-dione (erythromycin D)
InChIKeyCLQUUOKNEOQBSW-HYABICGWSA-N

02Structure identifiers

2D structurePubChem CID 5483653
2D structure: Erythromycin EP Impurity K, CAS 33442-56-7
Structure of Erythromycin EP Impurity K (CAS 33442-56-7). LazyChem record. Source identity: PubChem CID 5483653. Confirm the identifiers before analytical use.Download structure image

Structure facts for this exact identity.

Molecular formulaC36H65NO12
InChIKeyCLQUUOKNEOQBSW-HYABICGWSA-N
Ring count3
Defined stereocentres18
Unassigned stereocentres0
SMILESCC[C@@H]1[C@@H]([C@@H]([C@H](C(=O)[C@@H](C[C@@]([C@@H]([C@H]([C@@H]([C@H](C(=O)O1)C)O[C@H]2C[C@@]([C@@H]([C@@H](O2)C)O)(C)O)C)O[C@H]3[C@@H]([C@H](C[C@H](O3)C)N(C)C)O)(C)O)C)C)O)C
InChIInChI=1S/C36H65NO12/c1-13-25-19(4)28(39)20(5)27(38)17(2)15-36(10,44)32(49-34-29(40)24(37(11)12)14-18(3)45-34)21(6)30(22(7)33(42)47-25)48-26-16-35(9,43)31(41)23(8)46-26/h17-26,28-32,34,39-41,43-44H,13-16H2,1-12H3/t17-,18-,19+,20+,21+,22-,23+,24+,25-,26+,28+,29-,30+,31-,32-,34+,35-,36-/m1/s1

03Stereochemistry

The published structure contains 18 defined and 0 unassigned tetrahedral stereocentres. The exact wedge-and-dash depiction is shown above.

Defined stereocentres182D structure
Unassigned stereocentres02D structure
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 262,144Before 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.

04Possible N-nitroso structures

A record-level structural review indicates a possible N-nitroso candidate. This is not a confirmed impurity, formation prediction or analytical finding.

Possible structure candidateUnconfirmed identity
Possible N-nitroso structural candidate related to Erythromycin EP Impurity K, CAS 33442-56-7
No CAS number, formation claim or analytical confirmation is assigned.

A structural result alone does not establish that a nitrosamine forms. A process-specific and analytical assessment is required.

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 / RCSNOT FOUND IN REVIEWED ENTRIESCAS 33442-56-7 was not found in the reviewed exact-identity entries. Generic, class, analogue, salt and isomer provisions were not evaluated.
SCOMETNOT FOUND IN REVIEWED CAS ENTRIESCAS 33442-56-7 was not found in the reviewed exact-CAS mapping. Generic and analogue entries were not evaluated.

06Names and relationships

Associated parent compound

Erythromycin

View API and impurity family

Other names

  • Erythromycin D
  • 3'-Demethyl-12-deoxyerythromycin
  • Erythromycin, 3''-O-demethyl-12-deoxy-
  • Erythromycin EP Impurity K / Erythromycin D

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