Record Information |
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Version | 5.0 |
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Status | Expected but not Quantified |
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Creation Date | 2013-06-12 17:32:28 UTC |
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Update Date | 2021-09-14 14:57:30 UTC |
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HMDB ID | HMDB0060534 |
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Secondary Accession Numbers | |
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Metabolite Identification |
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Common Name | Desmethylazelastine |
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Description | Desmethylazelastine belongs to the class of organic compounds known as phthalazinones. Phthalazinones are compounds containing a phthalazine bearing a ketone group. Desmethylazelastine is a metabolite of Azelastine. Desmethylazelastine is a very strong basic compound (based on its pKa). Azelastine N-demethylation in humans liver microsomes is catalyzed mainly by CYP3A4 and CYP2D6, and CYP1A2 to a small extent (in average, 76.6, 21.8, and 3.9%, respectively. Azelastine, an antiallergy and antiasthmatic drug, has been reported to be mainly N-demethylated to desmethylazelastine in humans. |
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Structure | ClC1=CC=C(CC2=NN(C3CCCNCC3)C(=O)C3=CC=CC=C23)C=C1 InChI=1S/C21H22ClN3O/c22-16-9-7-15(8-10-16)14-20-18-5-1-2-6-19(18)21(26)25(24-20)17-4-3-12-23-13-11-17/h1-2,5-10,17,23H,3-4,11-14H2 |
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Synonyms | Value | Source |
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4-(4-Chlorobenzyl)-2-(perhydroazepinyl-(4))-1(2H)-phthala zinone | HMDB | Desmethylazelastine hydrobromide | HMDB |
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Chemical Formula | C21H22ClN3O |
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Average Molecular Weight | 367.872 |
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Monoisotopic Molecular Weight | 367.145140048 |
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IUPAC Name | 2-(azepan-4-yl)-4-[(4-chlorophenyl)methyl]-1,2-dihydrophthalazin-1-one |
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Traditional Name | 2-(azepan-4-yl)-4-[(4-chlorophenyl)methyl]phthalazin-1-one |
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CAS Registry Number | Not Available |
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SMILES | ClC1=CC=C(CC2=NN(C3CCCNCC3)C(=O)C3=CC=CC=C23)C=C1 |
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InChI Identifier | InChI=1S/C21H22ClN3O/c22-16-9-7-15(8-10-16)14-20-18-5-1-2-6-19(18)21(26)25(24-20)17-4-3-12-23-13-11-17/h1-2,5-10,17,23H,3-4,11-14H2 |
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InChI Key | WRYCMIFVXDQIKN-UHFFFAOYSA-N |
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Chemical Taxonomy |
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Description | Belongs to the class of organic compounds known as phthalazinones. Phthalazinones are compounds containing a phthalazine bearing a ketone group. |
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Kingdom | Organic compounds |
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Super Class | Organoheterocyclic compounds |
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Class | Diazanaphthalenes |
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Sub Class | Benzodiazines |
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Direct Parent | Phthalazinones |
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Alternative Parents | |
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Substituents | - Phthalazinone
- Azepane
- Chlorobenzene
- Halobenzene
- Pyridazinone
- Aryl chloride
- Aryl halide
- Monocyclic benzene moiety
- Benzenoid
- Pyridazine
- Heteroaromatic compound
- Lactam
- Secondary aliphatic amine
- Azacycle
- Secondary amine
- Organohalogen compound
- Organic nitrogen compound
- Amine
- Hydrocarbon derivative
- Organic oxide
- Organopnictogen compound
- Organic oxygen compound
- Organochloride
- Organonitrogen compound
- Organooxygen compound
- Aromatic heteropolycyclic compound
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Molecular Framework | Aromatic heteropolycyclic compounds |
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External Descriptors | Not Available |
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Ontology |
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Physiological effect | Not Available |
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Disposition | |
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Process | Not Available |
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Role | Not Available |
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Physical Properties |
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State | Not Available |
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Experimental Molecular Properties | Property | Value | Reference |
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Melting Point | Not Available | Not Available | Boiling Point | Not Available | Not Available | Water Solubility | Not Available | Not Available | LogP | Not Available | Not Available |
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Experimental Chromatographic Properties | Not Available |
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Predicted Molecular Properties | |
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Predicted Chromatographic Properties | Predicted Collision Cross SectionsPredicted Kovats Retention IndicesUnderivatizedDerivatizedDerivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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Desmethylazelastine,1TMS,isomer #1 | C[Si](C)(C)N1CCCC(N2N=C(CC3=CC=C(Cl)C=C3)C3=CC=CC=C3C2=O)CC1 | 3446.3 | Semi standard non polar | 33892256 | Desmethylazelastine,1TMS,isomer #1 | C[Si](C)(C)N1CCCC(N2N=C(CC3=CC=C(Cl)C=C3)C3=CC=CC=C3C2=O)CC1 | 3235.0 | Standard non polar | 33892256 | Desmethylazelastine,1TMS,isomer #1 | C[Si](C)(C)N1CCCC(N2N=C(CC3=CC=C(Cl)C=C3)C3=CC=CC=C3C2=O)CC1 | 4264.1 | Standard polar | 33892256 | Desmethylazelastine,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N1CCCC(N2N=C(CC3=CC=C(Cl)C=C3)C3=CC=CC=C3C2=O)CC1 | 3686.9 | Semi standard non polar | 33892256 | Desmethylazelastine,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N1CCCC(N2N=C(CC3=CC=C(Cl)C=C3)C3=CC=CC=C3C2=O)CC1 | 3431.5 | Standard non polar | 33892256 | Desmethylazelastine,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N1CCCC(N2N=C(CC3=CC=C(Cl)C=C3)C3=CC=CC=C3C2=O)CC1 | 4386.4 | Standard polar | 33892256 |
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| GC-MS SpectraSpectrum Type | Description | Splash Key | Deposition Date | Source | View |
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Predicted GC-MS | Predicted GC-MS Spectrum - Desmethylazelastine GC-MS (Non-derivatized) - 70eV, Positive | splash10-0002-9352000000-9747b61b1bcac506ff80 | 2017-09-20 | Wishart Lab | View Spectrum | Predicted GC-MS | Predicted GC-MS Spectrum - Desmethylazelastine GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-12 | Wishart Lab | View Spectrum | Predicted GC-MS | Predicted GC-MS Spectrum - Desmethylazelastine GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-12 | Wishart Lab | View Spectrum |
MS/MS SpectraSpectrum Type | Description | Splash Key | Deposition Date | Source | View |
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Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 10V, Positive-QTOF | splash10-014i-0019000000-6219d0f9716d2096c511 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 20V, Positive-QTOF | splash10-014l-4069000000-7121f0f66d54ee277a7a | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 40V, Positive-QTOF | splash10-052e-9110000000-51890a7242802275cbd9 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 10V, Negative-QTOF | splash10-014i-0019000000-c5670a14bce0763c5cf5 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 20V, Negative-QTOF | splash10-014i-1159000000-b306171246152d95ce4d | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 40V, Negative-QTOF | splash10-014i-2190000000-72823a7e766ec67168cb | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 10V, Positive-QTOF | splash10-014i-0009000000-0511774b14bf8182a193 | 2021-10-12 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 20V, Positive-QTOF | splash10-014i-0019000000-161442246dc19b21d97e | 2021-10-12 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 40V, Positive-QTOF | splash10-054k-9432000000-84cb52524ff08770a3ad | 2021-10-12 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 10V, Negative-QTOF | splash10-014i-0009000000-5826527ea80f1a2cb74d | 2021-10-12 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 20V, Negative-QTOF | splash10-014i-0359000000-9bd1b7ba64b43c7dfdf8 | 2021-10-12 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Desmethylazelastine 40V, Negative-QTOF | splash10-053r-8891000000-23ae97f8da34e69f21a5 | 2021-10-12 | Wishart Lab | View Spectrum |
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General References | - Nakajima M, Nakamura S, Tokudome S, Shimada N, Yamazaki H, Yokoi T: Azelastine N-demethylation by cytochrome P-450 (CYP)3A4, CYP2D6, and CYP1A2 in human liver microsomes: evaluation of approach to predict the contribution of multiple CYPs. Drug Metab Dispos. 1999 Dec;27(12):1381-91. [PubMed:10570018 ]
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