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Pharmaceutical impurity

Ramipril EP Impurity M

Ramipril EP Impurity M is listed in the pharmaceutical impurity collection under CAS 2743-38-6. Its represented structure has formula C18H14O8 and a calculated molecular weight of 358.30 g/mol.

2D chemical structure

O O O H O O O O H O ( R ) ( R )

Chemical identity

Catalog name
Ramipril EP Impurity M
Common name
Ramipril EP Impurity M
Chemical name
(2R,3R)-2,3-dibenzoyloxybutanedioic acid
CAS
2743-38-6
SMILES
O=C(O[C@@H](C(=O)O)[C@@H](OC(=O)c1ccccc1)C(=O)O)c1ccccc1
InChI
InChI=1S/C18H14O8/c19-15(20)13(25-17(23)11-7-3-1-4-8-11)14(16(21)22)26-18(24)12-9-5-2-6-10-12/h1-10,13-14H,(H,19,20)(H,21,22)/t13-,14-/m1/s1
InChIKey
YONLFQNRGZXBBF-ZIAGYGMSSA-N
Associated API
Ramipril

Record ID: Acf4e44a655ef

Computed properties

C18H14O8 Molecular formula
358.302 g/molMolecular weight
358.0689 DaMonoisotopic exact mass
127.2 ŲTopological polar surface area
1.6068 Calculated LogP (Wildman–Crippen)
86.5626 cm³/molMolar refractivity (Wildman–Crippen)
6 countHydrogen-bond acceptors
2 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 O 0 4 8 12 16 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 weight358.30260.04
Calculated LogP (Wildman–Crippen)1.606835.37
Topological polar surface area127.284.00
Hydrogen-bond acceptors675.83
Hydrogen-bond donors264.87
Rotatable bonds (strict)776.94

Complete molecular descriptors

PropertyCalculated valueUnit / type
Molecular formulaC18H14O8dimensionless
Molecular weight358.302g/mol
Monoisotopic exact mass358.0689Da
Topological polar surface area127.2Ų
Calculated LogP (Wildman–Crippen)1.6068dimensionless
Molar refractivity (Wildman–Crippen)86.5626cm³/mol
Hydrogen-bond acceptors6count
Hydrogen-bond donors2count
Rotatable bonds (strict)7count
Heavy atoms26count
Heteroatoms8count
Rings2count
Aromatic rings2count
Aliphatic rings0count
Saturated rings0count
Aromatic heterocycles0count
Aliphatic heterocycles0count
Saturated heterocycles0count
Aromatic carbocycles2count
Aliphatic carbocycles0count
Fraction of sp³ carbon atoms0.1111fraction
Formal charge0e
Disconnected components1count
Isotopically specified atoms0count
Potential atom stereocenters2count
Unspecified atom stereocenters0count
Spiro atoms0count
Bridgehead atoms0count
Labute approximate surface area147.1398Ų
Valence electrons134count
Radical electrons0count
Bertz complexity730.9555index
Balaban J2.203index

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 Ramipril EP Impurity M

Qualification and safety assessment of Ramipril EP Impurity M

Explore toxicological qualification of Ramipril EP Impurity M and ICH M7 mutagenic impurity assessment of Ramipril EP Impurity M for evaluation of this impurity in its pharmaceutical context.

Where data gaps need to be addressed, resources include read-across assessment for Ramipril EP Impurity M and acceptable intake and limit justification for Ramipril EP Impurity M. 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 Ramipril EP Impurity M

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