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Pharmaceutical impurity

2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide

2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide is listed in the pharmaceutical impurity collection under CAS 105959-56-6. Its represented structure has formula C21H27NO and a calculated molecular weight of 309.45 g/mol.

2D chemical structure

O N H

Chemical identity

Catalog name
2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide
Common name
2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide
Chemical name
2-[4-(2-methylpropyl)phenyl]-N-(1-phenylethyl)propanamide
CAS
105959-56-6
SMILES
CC(C)Cc1ccc(C(C)C(=O)NC(C)c2ccccc2)cc1
InChI
InChI=1S/C21H27NO/c1-15(2)14-18-10-12-19(13-11-18)16(3)21(23)22-17(4)20-8-6-5-7-9-20/h5-13,15-17H,14H2,1-4H3,(H,22,23)
InChIKey
BLNIYEIMTLMHGY-UHFFFAOYSA-N

Record ID: A0f7cc7d5fb30

Computed properties

C21H27NO Molecular formula
309.453 g/molMolecular weight
309.2093 DaMonoisotopic exact mass
29.1 ŲTopological polar surface area
4.866 Calculated LogP (Wildman–Crippen)
96.3987 cm³/molMolar refractivity (Wildman–Crippen)
1 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. 2 potential atom stereocenters have unspecified configuration.

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 weight309.45346.95
Calculated LogP (Wildman–Crippen)4.86688.49
Topological polar surface area29.112.42
Hydrogen-bond acceptors14.43
Hydrogen-bond donors138.08
Rotatable bonds (strict)669.73

Complete molecular descriptors

PropertyCalculated valueUnit / type
Molecular formulaC21H27NOdimensionless
Molecular weight309.453g/mol
Monoisotopic exact mass309.2093Da
Topological polar surface area29.1Ų
Calculated LogP (Wildman–Crippen)4.866dimensionless
Molar refractivity (Wildman–Crippen)96.3987cm³/mol
Hydrogen-bond acceptors1count
Hydrogen-bond donors1count
Rotatable bonds (strict)6count
Heavy atoms23count
Heteroatoms2count
Rings2count
Aromatic rings2count
Aliphatic rings0count
Saturated rings0count
Aromatic heterocycles0count
Aliphatic heterocycles0count
Saturated heterocycles0count
Aromatic carbocycles2count
Aliphatic carbocycles0count
Fraction of sp³ carbon atoms0.381fraction
Formal charge0e
Disconnected components1count
Isotopically specified atoms0count
Potential atom stereocenters2count
Unspecified atom stereocenters2count
Spiro atoms0count
Bridgehead atoms0count
Labute approximate surface area139.4844Ų
Valence electrons122count
Radical electrons0count
Bertz complexity616.0496index
Balaban J1.9882index

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 2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide

Qualification and safety assessment of 2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide

Explore toxicological qualification of 2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide and ICH M7 mutagenic impurity assessment of 2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide for evaluation of this impurity in its pharmaceutical context.

Where data gaps need to be addressed, resources include read-across assessment for 2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide and acceptable intake and limit justification for 2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide. 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.

Discuss an assessment for 2-(4-Isobutylphenyl)-N-(1-phenylethyl)propionamide

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