Chemical identity

O-Desmethylpimobendan

CAS 108381-22-2 · C18H16N4O2

01Identity

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

Lazychem IDLC-23842
PubChem CID122345
NameO-Desmethylpimobendan
CAS RN108381-22-2
Molecular formulaC18H16N4O2
Molecular weight320.35 g/mol
IUPAC name6-(2-(4-Hydroxyphenyl)-1H-benzo[d]imidazol-6-yl)-5-methyl-4,5-dihydropyridazin-3(2H)-one
InChIKeyQOAXSEARPHDXFC-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 122345
Two-dimensional chemical structure of O-Desmethylpimobendan, CAS 108381-22-2
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 4 rings, includes aromatic atoms, includes aliphatic carbon. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres1
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESO=C1CC(C)C(C2=CC=C3C(NC(C4=CC=C(O)C=C4)=N3)=C2)=NN1
InChINot listed
Formula from structureC18H16N4O2
Molecular weight from structure320.35 g/mol

03Stereochemistry

The published structure contains 0 defined and 1 unassigned tetrahedral stereocentre. The exact wedge and dash depiction is shown above.

Defined centres0Structure assigned
Unassigned centres1Structure unspecified
Assignment statusUnassignedExact published identity
Tetrahedral upper bound≤ 2Before 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 FOUNDCAS 108381-22-2 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 108381-22-2 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

Pimobendan

View API and impurity family

Other names

  • 4-methyl-3-[2-(4-oxocyclohexa-2, 5-dien-1-ylidene)-1, 3-dihydrobenzimidazol-5-yl]-4, 5-dihydro-1H-pyridazin-6-one
  • 3(2H)-Pyridazinone, 4, 5-dihydro-6-(2-(4-hydroxyphenyl)-1H-benzimidazol-6-yl)-5-methyl-
  • 2-(4-hydroxyphenyl)-5-(5-methyl-3-oxo-4, 5-dihydro-2h-6-pyridazinyl)benzimidazole

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