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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2021-09-11 17:04:25 UTC
Update Date2021-09-26 23:12:18 UTC
HMDB IDHMDB0256557
Secondary Accession NumbersNone
Metabolite Identification
Common NamePinacidil pyridine N-oxide
DescriptionPinacidil pyridine N-oxide, also known as pinacidil N-oxide, belongs to the class of organic compounds known as dihydropyridines. Dihydropyridines are compounds containing a dihydropyridine moiety, which is a semi-saturated pyridine derivative with two double bonds. Based on a literature review a significant number of articles have been published on Pinacidil pyridine N-oxide. This compound has been identified in human blood as reported by (PMID: 31557052 ). Pinacidil pyridine n-oxide is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically Pinacidil pyridine N-oxide is part of the human exposome. The exposome can be defined as the collection of all the exposures of an individual in a lifetime and how those exposures relate to health. An individual's exposure begins before birth and includes insults from environmental and occupational sources.
Structure
Thumb
Synonyms
ValueSource
N-Cyano-n'-4-pyridinyl-N-oxide-n''-(1,2,2-trimethylpropyl)guanidineHMDB
Pinacidil N-oxideHMDB
Chemical FormulaC13H19N5O
Average Molecular Weight261.329
Monoisotopic Molecular Weight261.158960252
IUPAC NameN'-cyano-N''-(3,3-dimethylbutan-2-yl)-N-(1-hydroxy-1,4-dihydropyridin-4-ylidene)guanidine
Traditional NameN'-cyano-N''-(3,3-dimethylbutan-2-yl)-N-(1-hydroxypyridin-4-ylidene)guanidine
CAS Registry NumberNot Available
SMILES
CC(N=C(NC#N)N=C1C=CN(O)C=C1)C(C)(C)C
InChI Identifier
InChI=1S/C13H19N5O/c1-10(13(2,3)4)16-12(15-9-14)17-11-5-7-18(19)8-6-11/h5-8,10,19H,1-4H3,(H,15,16)
InChI KeyDQRXZTGBHIYUGA-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as dihydropyridines. Dihydropyridines are compounds containing a dihydropyridine moiety, which is a semi-saturated pyridine derivative with two double bonds.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassPyridines and derivatives
Sub ClassHydropyridines
Direct ParentDihydropyridines
Alternative Parents
Substituents
  • Dihydropyridine
  • Heteroaromatic compound
  • Secondary ketimine
  • Azacycle
  • Organic 1,3-dipolar compound
  • Propargyl-type 1,3-dipolar organic compound
  • Carboximidamide
  • Organic nitrogen compound
  • Organic oxygen compound
  • Organopnictogen compound
  • Hydrocarbon derivative
  • Organonitrogen compound
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External DescriptorsNot Available
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
RoleNot Available
Physical Properties
StateNot Available
Experimental Molecular Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
PropertyValueSource
logP1.83ALOGPS
logP1.76ChemAxon
logS-3.3ALOGPS
pKa (Strongest Acidic)14.86ChemAxon
pKa (Strongest Basic)7.17ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count6ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area84.01 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity75.05 m³·mol⁻¹ChemAxon
Polarizability28.13 ųChemAxon
Number of Rings1ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DeepCCS[M+H]+162.53530932474
DeepCCS[M-H]-160.13930932474
DeepCCS[M-2H]-193.02330932474
DeepCCS[M+Na]+168.57930932474
AllCCS[M+H]+160.432859911
AllCCS[M+H-H2O]+157.132859911
AllCCS[M+NH4]+163.532859911
AllCCS[M+Na]+164.432859911
AllCCS[M-H]-165.032859911
AllCCS[M+Na-2H]-165.332859911
AllCCS[M+HCOO]-165.832859911

Predicted Retention Times

Underivatized

Chromatographic MethodRetention TimeReference
Measured using a Waters Acquity ultraperformance liquid chromatography (UPLC) ethylene-bridged hybrid (BEH) C18 column (100 mm × 2.1 mm; 1.7 μmparticle diameter). Predicted by Afia on May 17, 2022. Predicted by Afia on May 17, 2022.2.25 minutes32390414
Predicted by Siyang on May 30, 202212.2111 minutes33406817
Predicted by Siyang using ReTip algorithm on June 8, 20223.26 minutes32390414
Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid601.5 seconds40023050
Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid298.7 seconds40023050
Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid51.2 seconds40023050
Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid164.4 seconds40023050
RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid51.0 seconds40023050
Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid398.9 seconds40023050
BfG_NTS_RP1 =Agilent Zorbax Eclipse Plus C18 (2.1 mm x 150 mm, 3.5 um) with Water:ACN and 0.1% Formic Acid280.6 seconds40023050
HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate)603.5 seconds40023050
UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid738.8 seconds40023050
BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid46.8 seconds40023050
UFZ_Phenomenex = Kinetex Core-Shell C18 2.6 um, 3.0 x 100 mm, Phenomenex with Water:MeOH and 0.1% Formic Acid748.2 seconds40023050
SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid177.6 seconds40023050
RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid256.0 seconds40023050
MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate571.7 seconds40023050
KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA518.8 seconds40023050
Meister zic-pHILIC pH9.3 = Merck SeQuant ZIC-pHILIC column with ACN:Water 5mM NH4Ac pH9.3 and 5mM ammonium acetate in water98.7 seconds40023050

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
Pinacidil pyridine N-oxideCC(N=C(NC#N)N=C1C=CN(O)C=C1)C(C)(C)C2945.2Standard polar33892256
Pinacidil pyridine N-oxideCC(N=C(NC#N)N=C1C=CN(O)C=C1)C(C)(C)C2197.5Standard non polar33892256
Pinacidil pyridine N-oxideCC(N=C(NC#N)N=C1C=CN(O)C=C1)C(C)(C)C2507.9Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
Pinacidil pyridine N-oxide,1TMS,isomer #1CC(N=C(N=C1C=CN(O)C=C1)N(C#N)[Si](C)(C)C)C(C)(C)C2345.0Semi standard non polar33892256
Pinacidil pyridine N-oxide,1TMS,isomer #1CC(N=C(N=C1C=CN(O)C=C1)N(C#N)[Si](C)(C)C)C(C)(C)C2371.8Standard non polar33892256
Pinacidil pyridine N-oxide,1TMS,isomer #1CC(N=C(N=C1C=CN(O)C=C1)N(C#N)[Si](C)(C)C)C(C)(C)C3430.3Standard polar33892256
Pinacidil pyridine N-oxide,1TBDMS,isomer #1CC(N=C(N=C1C=CN(O)C=C1)N(C#N)[Si](C)(C)C(C)(C)C)C(C)(C)C2583.9Semi standard non polar33892256
Pinacidil pyridine N-oxide,1TBDMS,isomer #1CC(N=C(N=C1C=CN(O)C=C1)N(C#N)[Si](C)(C)C(C)(C)C)C(C)(C)C2548.1Standard non polar33892256
Pinacidil pyridine N-oxide,1TBDMS,isomer #1CC(N=C(N=C1C=CN(O)C=C1)N(C#N)[Si](C)(C)C(C)(C)C)C(C)(C)C3403.6Standard polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - Pinacidil pyridine N-oxide GC-MS (Non-derivatized) - 70eV, Positivesplash10-0bt9-9620000000-f8b527f80828ab49dec42021-09-23Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Pinacidil pyridine N-oxide GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen Locations
  • Blood
Tissue LocationsNot Available
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodDetected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FooDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID58309
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound64775
PDB IDNot Available
ChEBI IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB IDNot Available
Good Scents IDNot Available
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Barupal DK, Fiehn O: Generating the Blood Exposome Database Using a Comprehensive Text Mining and Database Fusion Approach. Environ Health Perspect. 2019 Sep;127(9):97008. doi: 10.1289/EHP4713. Epub 2019 Sep 26. [PubMed:31557052 ]