Record Information |
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Version | 5.0 |
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Status | Expected but not Quantified |
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Creation Date | 2012-09-06 15:16:52 UTC |
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Update Date | 2023-02-21 17:18:29 UTC |
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HMDB ID | HMDB0015400 |
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Secondary Accession Numbers | |
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Metabolite Identification |
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Common Name | Hydralazine |
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Description | Hydralazine is only found in individuals that have used or taken this drug. It is a direct-acting vasodilator that is used as an antihypertensive agent. [PubChem]Although the precise mechanism of action of hydralazine is not fully understood, the major effects are on the cardiovascular system. Hydralazine apparently lowers blood pressure by exerting a peripheral vasodilating effect through a direct relaxation of vascular smooth muscle. It has also been suggested that cyclic 3',5'-adenosine monophosphate (cyclic AMP) mediates, at least partly, the relaxation of arterial smooth muscle by altering cellular calcium metabolism, which interferes with the calcium movements within the vascular smooth muscle that are responsible for initiating or maintaining the contractile state. In hypertensive patients, the hydralazine-induced decrease in blood pressure is accompanied by increased heart rate, cardiac output, and stroke volume, probably because of a reflex response to decreased peripheral resistance. The drug has no direct effect on the heart. Hydralazine may increase pulmonary arterial pressure, as well as coronary, splanchnic, cerebral, and renal blood flow. The preferential dilatation of arterioles, as compared to veins, minimizes postural hypotension and promotes the increase in cardiac output. Hydralazine usually increases renin activity in plasma, presumably as a result of increased secretion of renin by the renal juxtaglomerular cells in response to reflex sympathetic discharge. This increase in renin activity leads to the production of angiotensin II, which then causes stimulation of aldosterone and consequent sodium reabsorption. Tolerance to the antihypertensive effect of the drug develops during prolonged therapy, especially if a diuretic is not administered concurrently. In patients with CHF, hydralazine decreases systemic vascular resistance and increases cardiac output. |
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Structure | InChI=1S/C8H8N4/c9-11-8-7-4-2-1-3-6(7)5-10-12-8/h1-5H,9H2,(H,11,12) |
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Synonyms | Value | Source |
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(1Z)-1(2H)-Phthalazinone hydrazone | ChEBI | (2H)-Phthalazinone hydrazone | ChEBI | 1-Hydrazinophthalazine | ChEBI | 1-Phthalazinylhydrazine | ChEBI | 6-Hydralazine | ChEBI | Hidralazina | ChEBI | Hydralazin | ChEBI | Hydralazinum | ChEBI | Hydrallazine | ChEBI | Hydrazinophthalazine | ChEBI | Hydrazone 1(2H)-phthalazinone | ChEBI | Hypophthalin | ChEBI | Idralazina | ChEBI | Phthalazin-1-ylhydrazine | ChEBI | Hidral | Kegg | Hydralazine hydrochloride | HMDB | Nepresol | HMDB | Apressin | HMDB | Apressoline | HMDB | Hydralazine mono hydrochloride | HMDB | Hydralazine mono-hydrochloride | HMDB | Hydrallazin | HMDB | Hydrochloride, hydralazine | HMDB | mono-Hydrochloride, hydralazine | HMDB | Apresoline | HMDB |
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Chemical Formula | C8H8N4 |
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Average Molecular Weight | 160.1759 |
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Monoisotopic Molecular Weight | 160.074896276 |
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IUPAC Name | 1-hydrazinylphthalazine |
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Traditional Name | hydralazine |
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CAS Registry Number | 86-54-4 |
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SMILES | NNC1=NN=CC2=CC=CC=C12 |
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InChI Identifier | InChI=1S/C8H8N4/c9-11-8-7-4-2-1-3-6(7)5-10-12-8/h1-5H,9H2,(H,11,12) |
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InChI Key | RPTUSVTUFVMDQK-UHFFFAOYSA-N |
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Chemical Taxonomy |
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Description | Belongs to the class of organic compounds known as phthalazines. Phthalazines are compounds containing a phthalazine moiety, which consists of a benzene ring fused to a pyridazine, forming a 2,3-benzodiazine skeleton. |
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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 | Phthalazines |
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Alternative Parents | |
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Substituents | - Phthalazine
- Imidolactam
- Benzenoid
- Pyridazine
- Heteroaromatic compound
- Carboxylic acid amidrazone
- Azacycle
- Hydrazone
- Organic nitrogen compound
- Organopnictogen compound
- Hydrocarbon derivative
- Organonitrogen compound
- Aromatic heteropolycyclic compound
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Molecular Framework | Aromatic heteropolycyclic compounds |
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External Descriptors | |
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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 | Solid |
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Experimental Molecular Properties | Property | Value | Reference |
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Melting Point | 172 - 173 °C | Not Available | Boiling Point | Not Available | Not Available | Water Solubility | 2.61 g/L | Not Available | LogP | 0.7 | 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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Hydralazine,1TMS,isomer #1 | C[Si](C)(C)NNC1=NN=CC2=CC=CC=C12 | 1839.2 | Semi standard non polar | 33892256 | Hydralazine,1TMS,isomer #1 | C[Si](C)(C)NNC1=NN=CC2=CC=CC=C12 | 1769.0 | Standard non polar | 33892256 | Hydralazine,1TMS,isomer #1 | C[Si](C)(C)NNC1=NN=CC2=CC=CC=C12 | 2866.3 | Standard polar | 33892256 | Hydralazine,1TMS,isomer #2 | C[Si](C)(C)N(N)C1=NN=CC2=CC=CC=C12 | 1734.8 | Semi standard non polar | 33892256 | Hydralazine,1TMS,isomer #2 | C[Si](C)(C)N(N)C1=NN=CC2=CC=CC=C12 | 1782.8 | Standard non polar | 33892256 | Hydralazine,1TMS,isomer #2 | C[Si](C)(C)N(N)C1=NN=CC2=CC=CC=C12 | 2910.1 | Standard polar | 33892256 | Hydralazine,2TMS,isomer #1 | C[Si](C)(C)N(NC1=NN=CC2=CC=CC=C12)[Si](C)(C)C | 1892.9 | Semi standard non polar | 33892256 | Hydralazine,2TMS,isomer #1 | C[Si](C)(C)N(NC1=NN=CC2=CC=CC=C12)[Si](C)(C)C | 1934.1 | Standard non polar | 33892256 | Hydralazine,2TMS,isomer #1 | C[Si](C)(C)N(NC1=NN=CC2=CC=CC=C12)[Si](C)(C)C | 2703.0 | Standard polar | 33892256 | Hydralazine,2TMS,isomer #2 | C[Si](C)(C)NN(C1=NN=CC2=CC=CC=C12)[Si](C)(C)C | 1821.0 | Semi standard non polar | 33892256 | Hydralazine,2TMS,isomer #2 | C[Si](C)(C)NN(C1=NN=CC2=CC=CC=C12)[Si](C)(C)C | 1851.3 | Standard non polar | 33892256 | Hydralazine,2TMS,isomer #2 | C[Si](C)(C)NN(C1=NN=CC2=CC=CC=C12)[Si](C)(C)C | 2422.0 | Standard polar | 33892256 | Hydralazine,3TMS,isomer #1 | C[Si](C)(C)N(C1=NN=CC2=CC=CC=C12)N([Si](C)(C)C)[Si](C)(C)C | 1910.3 | Semi standard non polar | 33892256 | Hydralazine,3TMS,isomer #1 | C[Si](C)(C)N(C1=NN=CC2=CC=CC=C12)N([Si](C)(C)C)[Si](C)(C)C | 2016.7 | Standard non polar | 33892256 | Hydralazine,3TMS,isomer #1 | C[Si](C)(C)N(C1=NN=CC2=CC=CC=C12)N([Si](C)(C)C)[Si](C)(C)C | 2313.2 | Standard polar | 33892256 | Hydralazine,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)NNC1=NN=CC2=CC=CC=C12 | 2092.9 | Semi standard non polar | 33892256 | Hydralazine,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)NNC1=NN=CC2=CC=CC=C12 | 1945.9 | Standard non polar | 33892256 | Hydralazine,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)NNC1=NN=CC2=CC=CC=C12 | 2970.6 | Standard polar | 33892256 | Hydralazine,1TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)N(N)C1=NN=CC2=CC=CC=C12 | 1974.4 | Semi standard non polar | 33892256 | Hydralazine,1TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)N(N)C1=NN=CC2=CC=CC=C12 | 1969.3 | Standard non polar | 33892256 | Hydralazine,1TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)N(N)C1=NN=CC2=CC=CC=C12 | 2972.1 | Standard polar | 33892256 | Hydralazine,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N(NC1=NN=CC2=CC=CC=C12)[Si](C)(C)C(C)(C)C | 2311.5 | Semi standard non polar | 33892256 | Hydralazine,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N(NC1=NN=CC2=CC=CC=C12)[Si](C)(C)C(C)(C)C | 2305.0 | Standard non polar | 33892256 | Hydralazine,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N(NC1=NN=CC2=CC=CC=C12)[Si](C)(C)C(C)(C)C | 2868.7 | Standard polar | 33892256 | Hydralazine,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)NN(C1=NN=CC2=CC=CC=C12)[Si](C)(C)C(C)(C)C | 2235.5 | Semi standard non polar | 33892256 | Hydralazine,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)NN(C1=NN=CC2=CC=CC=C12)[Si](C)(C)C(C)(C)C | 2288.5 | Standard non polar | 33892256 | Hydralazine,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)NN(C1=NN=CC2=CC=CC=C12)[Si](C)(C)C(C)(C)C | 2627.6 | Standard polar | 33892256 | Hydralazine,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N(C1=NN=CC2=CC=CC=C12)N([Si](C)(C)C(C)(C)C)[Si](C)(C)C(C)(C)C | 2479.2 | Semi standard non polar | 33892256 | Hydralazine,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N(C1=NN=CC2=CC=CC=C12)N([Si](C)(C)C(C)(C)C)[Si](C)(C)C(C)(C)C | 2664.4 | Standard non polar | 33892256 | Hydralazine,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)N(C1=NN=CC2=CC=CC=C12)N([Si](C)(C)C(C)(C)C)[Si](C)(C)C(C)(C)C | 2610.3 | 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 - Hydralazine GC-MS (Non-derivatized) - 70eV, Positive | splash10-01q9-1900000000-f91e3313037f100cda4a | 2017-09-01 | Wishart Lab | View Spectrum | Predicted GC-MS | Predicted GC-MS Spectrum - Hydralazine 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 - Hydralazine 10V, Positive-QTOF | splash10-03di-0900000000-8b7f181371fbed1e004c | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 20V, Positive-QTOF | splash10-03e9-0900000000-8e1028367f84d64f9c73 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 40V, Positive-QTOF | splash10-0f89-3900000000-324287ae696d06b87174 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 10V, Negative-QTOF | splash10-0a4i-0900000000-a3afccefb2246e5901f0 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 20V, Negative-QTOF | splash10-0560-0900000000-7b01083726dab57d5322 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 40V, Negative-QTOF | splash10-0a59-1900000000-15fc53aed0fa9d04b4d3 | 2016-08-03 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 10V, Positive-QTOF | splash10-03di-0900000000-86317c6fb29f228114ab | 2021-10-11 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 20V, Positive-QTOF | splash10-03xu-4900000000-7990b6c5790e6ba5beae | 2021-10-11 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 40V, Positive-QTOF | splash10-000i-9000000000-c0eb36379ffd59449206 | 2021-10-11 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 10V, Negative-QTOF | splash10-0a4i-0900000000-ac294195ce6174807530 | 2021-10-11 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 20V, Negative-QTOF | splash10-004i-0900000000-1ead11198d84b2fa9185 | 2021-10-11 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Hydralazine 40V, Negative-QTOF | splash10-0ufr-4900000000-48281db360c4a9ee1de6 | 2021-10-11 | Wishart Lab | View Spectrum |
NMR SpectraSpectrum Type | Description | Deposition Date | Source | View |
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Predicted 1D NMR | 1H NMR Spectrum (1D, 100 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 100 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 200 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 200 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 300 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 300 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 400 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 400 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 500 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 500 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 600 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 600 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 700 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 700 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 800 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 800 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 900 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 900 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 1H NMR Spectrum (1D, 1000 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum | Predicted 1D NMR | 13C NMR Spectrum (1D, 1000 MHz, D2O, predicted) | 2021-09-16 | Wishart Lab | View Spectrum |
IR SpectraSpectrum Type | Description | Deposition Date | Source | View |
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Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M-H]-) | 2023-02-03 | FELIX lab | View Spectrum | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+H]+) | 2023-02-03 | FELIX lab | View Spectrum | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+Na]+) | 2023-02-03 | FELIX lab | View Spectrum |
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