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Pharmaceutical impurity

Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester)

Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester) is listed in the pharmaceutical impurity collection under CAS 139481-69-9. Its represented structure has formula C25H22N6O3 and a calculated molecular weight of 454.49 g/mol.

2D chemical structure

O N O O N N N N H N

Chemical identity

Catalog name
Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester)
Common name
Not available
Chemical name
Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester)
CAS
139481-69-9
SMILES
CCOc1nc2cccc(C(=O)OC)c2n1Cc1ccc(-c2ccccc2-c2nn[nH]n2)cc1
InChI
InChI=1S/C25H22N6O3/c1-3-34-25-26-21-10-6-9-20(24(32)33-2)22(21)31(25)15-16-11-13-17(14-12-16)18-7-4-5-8-19(18)23-27-29-30-28-23/h4-14H,3,15H2,1-2H3,(H,27,28,29,30)
InChIKey
RBPFEPGTRLLUKI-UHFFFAOYSA-N
Associated API
Matrix - API Family Candesartan Cilexetil

Record ID: Aa524cce7878b

Computed properties

C25H22N6O3 Molecular formula
454.49 g/molMolecular weight
454.1753 DaMonoisotopic exact mass
107.81 ŲTopological polar surface area
4.117 Calculated LogP (Wildman–Crippen)
126.3932 cm³/molMolar refractivity (Wildman–Crippen)
7 countHydrogen-bond acceptors
1 countHydrogen-bond donors

Descriptors are calculated from the displayed SMILES. Calculated LogP is not a measured partition coefficient or a pH-specific LogD.

Molecular descriptor profile

Descriptor radar

Mol. weight LogP TPSA HBA HBD Rotatable 25 50 75 100

Structural feature counts

0 2 4 6 Count H-bond acceptors H-bond donors Rotatable bonds Rings Aromatic rings Stereo centers

Element composition

C H N O 0 6 12 18 24 Number of atoms

Radar scale: 0–100 percentile within 25,771 distinct represented structures in this release, using the midpoint rank for ties. Larger values indicate a higher descriptor rank, not greater safety or toxicity. Element counts include hydrogen and combine isotopes under each element.

Radar values and percentile reference
DescriptorValuePercentile
Molecular weight454.4979.52
Calculated LogP (Wildman–Crippen)4.11779.88
Topological polar surface area107.8176.39
Hydrogen-bond acceptors783.12
Hydrogen-bond donors138.08
Rotatable bonds (strict)776.94

Complete molecular descriptors

PropertyCalculated valueUnit / type
Molecular formulaC25H22N6O3dimensionless
Molecular weight454.49g/mol
Monoisotopic exact mass454.1753Da
Topological polar surface area107.81Ų
Calculated LogP (Wildman–Crippen)4.117dimensionless
Molar refractivity (Wildman–Crippen)126.3932cm³/mol
Hydrogen-bond acceptors7count
Hydrogen-bond donors1count
Rotatable bonds (strict)7count
Heavy atoms34count
Heteroatoms9count
Rings5count
Aromatic rings5count
Aliphatic rings0count
Saturated rings0count
Aromatic heterocycles2count
Aliphatic heterocycles0count
Saturated heterocycles0count
Aromatic carbocycles3count
Aliphatic carbocycles0count
Fraction of sp³ carbon atoms0.16fraction
Formal charge0e
Disconnected components1count
Isotopically specified atoms0count
Potential atom stereocenters0count
Unspecified atom stereocenters0count
Spiro atoms0count
Bridgehead atoms0count
Labute approximate surface area194.9099Ų
Valence electrons170count
Radical electrons0count
Bertz complexity1,441.8427index
Balaban J1.526index

Ring categories overlap and should not be summed. No toxicity result, PDE, HBEL or acceptable intake is inferred from these descriptors.

Toxicological services and resources for Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester)

Qualification and safety assessment of Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester)

Explore toxicological qualification of Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester) and ICH M7 mutagenic impurity assessment of Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester) for evaluation of this impurity in its pharmaceutical context.

Where data gaps need to be addressed, resources include read-across assessment for Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester) and acceptable intake and limit justification for Methyl 2-Ethoxy-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate (Candesartan Methyl Ester). The relevant approach depends on the available evidence, exposure and duration of use.

Related Altox services and technical resources

Other catalogue designations with the same represented structure

These are separate catalogue entries; shared structure does not establish interchangeable pharmacopoeial designations.

Identity sources and calculation method

Identifiers originate from the source catalogues and available public identity records. InChI and InChIKey on this page are generated from the displayed SMILES. RDKit validation checks the molecular representation; it does not independently verify every catalogue assignment.

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