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Showing metabocard for Isonicotinamide (HMDB0253663)

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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2021-09-11 12:27:54 UTC
Update Date2021-09-26 23:07:02 UTC
HMDB IDHMDB0253663
Secondary Accession NumbersNone
Metabolite Identification
Common NameIsonicotinamide
Descriptionisonicotinamide, also known as isn, belongs to the class of organic compounds known as pyridinecarboxamides. Pyridinecarboxamides are compounds containing a pyridine ring bearing a carboxamide. isonicotinamide is a strong basic compound (based on its pKa). A pyridinecarboxamide that is the monocarboxylic acid amide derivative of isonicotinic acid. This compound has been identified in human blood as reported by (PMID: 31557052 ). Isonicotinamide is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically Isonicotinamide 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
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MOL3D MOLSDF3D SDFPDB3D PDBSMILESInChI

MOL for HMDB0253663 (Isonicotinamide)


  Mrv1572004221603042D          

  9  9  0  0  0  0            999 V2000
    0.0000    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    2.0625    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    2.4750    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -0.4125    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    2.4750    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  3  1  1  0  0  0  0
  4  2  2  0  0  0  0
  5  1  2  0  0  0  0
  5  2  1  0  0  0  0
  6  5  1  0  0  0  0
  7  6  1  0  0  0  0
  8  3  2  0  0  0  0
  8  4  1  0  0  0  0
  9  6  2  0  0  0  0
M  END
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3D MOL for HMDB0253663 (Isonicotinamide)

HMDB0253663
     RDKit          3D
Isonicotinamide
 15 15  0  0  0  0  0  0  0  0999 V2000
    2.5808    0.4653    0.1600 N   0  0  0  0  0  0  0  0  0  0  0  0
    1.5956   -0.5368    0.1304 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9604   -1.7376    0.2050 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.1692   -0.2697    0.0179 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7706   -1.2776   -0.0082 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1245   -1.0039   -0.1158 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.5576    0.2764   -0.1986 N   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6674    1.2921   -0.1764 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3169    1.0292   -0.0695 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1765    0.7406   -0.6402 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.7525    1.0011    1.0587 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4406   -2.3077    0.0572 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7920   -1.8541   -0.1288 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.9608    2.3357   -0.2397 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.3955    1.8468   -0.0519 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  2  0
  2  4  1  0
  4  5  2  0
  5  6  1  0
  6  7  2  0
  7  8  1  0
  8  9  2  0
  9  4  1  0
  1 10  1  0
  1 11  1  0
  5 12  1  0
  6 13  1  0
  8 14  1  0
  9 15  1  0
M  END
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3D SDF for HMDB0253663 (Isonicotinamide)


  Mrv1572004221603042D          

  9  9  0  0  0  0            999 V2000
    0.0000    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    2.0625    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    2.4750    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -0.4125    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    2.4750    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  3  1  1  0  0  0  0
  4  2  2  0  0  0  0
  5  1  2  0  0  0  0
  5  2  1  0  0  0  0
  6  5  1  0  0  0  0
  7  6  1  0  0  0  0
  8  3  2  0  0  0  0
  8  4  1  0  0  0  0
  9  6  2  0  0  0  0
M  END
> <DATABASE_ID>
HMDB0253663

> <DATABASE_NAME>
hmdb

> <SMILES>
NC(=O)C1=CC=NC=C1

> <INCHI_IDENTIFIER>
InChI=1S/C6H6N2O/c7-6(9)5-1-3-8-4-2-5/h1-4H,(H2,7,9)

> <INCHI_KEY>
VFQXVTODMYMSMJ-UHFFFAOYSA-N

> <FORMULA>
C6H6N2O

> <MOLECULAR_WEIGHT>
122.127

> <EXACT_MASS>
122.048012821

> <JCHEM_ACCEPTOR_COUNT>
2

> <JCHEM_ATOM_COUNT>
15

> <JCHEM_AVERAGE_POLARIZABILITY>
11.689674485142541

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
1

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
0

> <JCHEM_IUPAC>
pyridine-4-carboxamide

> <ALOGPS_LOGP>
-0.49

> <JCHEM_LOGP>
-0.3937863166666665

> <ALOGPS_LOGS>
-0.24

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
1

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA_STRONGEST_ACIDIC>
13.714366564820896

> <JCHEM_PKA_STRONGEST_BASIC>
3.454829457325785

> <JCHEM_POLAR_SURFACE_AREA>
55.98

> <JCHEM_REFRACTIVITY>
32.9795

> <JCHEM_ROTATABLE_BOND_COUNT>
1

> <JCHEM_RULE_OF_FIVE>
1

> <ALOGPS_SOLUBILITY>
7.08e+01 g/l

> <JCHEM_TRADITIONAL_IUPAC>
isn

> <JCHEM_VEBER_RULE>
0

$$$$
Download

3D-SDF for HMDB0253663 (Isonicotinamide)

HMDB0253663
     RDKit          3D
Isonicotinamide
 15 15  0  0  0  0  0  0  0  0999 V2000
    2.5808    0.4653    0.1600 N   0  0  0  0  0  0  0  0  0  0  0  0
    1.5956   -0.5368    0.1304 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9604   -1.7376    0.2050 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.1692   -0.2697    0.0179 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7706   -1.2776   -0.0082 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1245   -1.0039   -0.1158 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.5576    0.2764   -0.1986 N   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6674    1.2921   -0.1764 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3169    1.0292   -0.0695 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1765    0.7406   -0.6402 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.7525    1.0011    1.0587 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4406   -2.3077    0.0572 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7920   -1.8541   -0.1288 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.9608    2.3357   -0.2397 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.3955    1.8468   -0.0519 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  2  0
  2  4  1  0
  4  5  2  0
  5  6  1  0
  6  7  2  0
  7  8  1  0
  8  9  2  0
  9  4  1  0
  1 10  1  0
  1 11  1  0
  5 12  1  0
  6 13  1  0
  8 14  1  0
  9 15  1  0
M  END
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PDB for HMDB0253663 (Isonicotinamide)

HEADER    PROTEIN                                 22-APR-16   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   22-APR-16         0                                  
HETATM    1  C   UNK     0       0.000   1.540   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       2.667   1.540   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       0.000  -0.000   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       2.667   0.000   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       1.334   2.310   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       1.334   3.850   0.000  0.00  0.00           C+0
HETATM    7  N   UNK     0       2.667   4.620   0.000  0.00  0.00           N+0
HETATM    8  N   UNK     0       1.334  -0.770   0.000  0.00  0.00           N+0
HETATM    9  O   UNK     0       0.000   4.620   0.000  0.00  0.00           O+0
CONECT    1    3    5                                                       
CONECT    2    4    5                                                       
CONECT    3    1    8                                                       
CONECT    4    2    8                                                       
CONECT    5    1    2    6                                                  
CONECT    6    5    7    9                                                  
CONECT    7    6                                                            
CONECT    8    3    4                                                       
CONECT    9    6                                                            
MASTER        0    0    0    0    0    0    0    0    9    0   18    0
END
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3D PDB for HMDB0253663 (Isonicotinamide)

COMPND    HMDB0253663
HETATM    1  N1  UNL     1       2.581   0.465   0.160  1.00  0.00           N  
HETATM    2  C1  UNL     1       1.596  -0.537   0.130  1.00  0.00           C  
HETATM    3  O1  UNL     1       1.960  -1.738   0.205  1.00  0.00           O  
HETATM    4  C2  UNL     1       0.169  -0.270   0.018  1.00  0.00           C  
HETATM    5  C3  UNL     1      -0.771  -1.278  -0.008  1.00  0.00           C  
HETATM    6  C4  UNL     1      -2.124  -1.004  -0.116  1.00  0.00           C  
HETATM    7  N2  UNL     1      -2.558   0.276  -0.199  1.00  0.00           N  
HETATM    8  C5  UNL     1      -1.667   1.292  -0.176  1.00  0.00           C  
HETATM    9  C6  UNL     1      -0.317   1.029  -0.069  1.00  0.00           C  
HETATM   10  H1  UNL     1       3.176   0.741  -0.640  1.00  0.00           H  
HETATM   11  H2  UNL     1       2.752   1.001   1.059  1.00  0.00           H  
HETATM   12  H3  UNL     1      -0.441  -2.308   0.057  1.00  0.00           H  
HETATM   13  H4  UNL     1      -2.792  -1.854  -0.129  1.00  0.00           H  
HETATM   14  H5  UNL     1      -1.961   2.336  -0.240  1.00  0.00           H  
HETATM   15  H6  UNL     1       0.396   1.847  -0.052  1.00  0.00           H  
CONECT    1    2   10   11
CONECT    2    3    3    4
CONECT    4    5    5    9
CONECT    5    6   12
CONECT    6    7    7   13
CONECT    7    8
CONECT    8    9    9   14
CONECT    9   15
END
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SMILES for HMDB0253663 (Isonicotinamide)

NC(=O)C1=CC=NC=C1
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INCHI for HMDB0253663 (Isonicotinamide)

InChI=1S/C6H6N2O/c7-6(9)5-1-3-8-4-2-5/h1-4H,(H2,7,9)
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View in JSmolView Stereo Labels
Synonyms
ValueSource
4-CarbamoylpyridineChEBI
4-PyridinecarboxamideChEBI
isnChEBI
IsonicotineamideChEBI
Isonicotinic acid amideChEBI
Pyridine-4-carboxylic acid amideChEBI
Isonicotinate amideGenerator
Pyridine-4-carboxylate amideGenerator
Chemical FormulaC6H6N2O
Average Molecular Weight122.127
Monoisotopic Molecular Weight122.048012821
IUPAC Namepyridine-4-carboxamide
Traditional Nameisn
CAS Registry NumberNot Available
SMILES
NC(=O)C1=CC=NC=C1
InChI Identifier
InChI=1S/C6H6N2O/c7-6(9)5-1-3-8-4-2-5/h1-4H,(H2,7,9)
InChI KeyVFQXVTODMYMSMJ-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as pyridinecarboxamides. Pyridinecarboxamides are compounds containing a pyridine ring bearing a carboxamide.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassPyridines and derivatives
Sub ClassPyridinecarboxylic acids and derivatives
Direct ParentPyridinecarboxamides
Alternative Parents
Substituents
  • Pyridinecarboxamide
  • Heteroaromatic compound
  • Primary carboxylic acid amide
  • Carboxamide group
  • Azacycle
  • Carboxylic acid derivative
  • Organic nitrogen compound
  • Organic oxygen compound
  • Organopnictogen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Organonitrogen compound
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External Descriptors
Ontology
Physiological effectNot Available
Disposition
Biological location
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
logP-0.49ALOGPS
logP-0.39ChemAxon
logS-0.24ALOGPS
pKa (Strongest Acidic)13.71ChemAxon
pKa (Strongest Basic)3.45ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area55.98 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity32.98 m³·mol⁻¹ChemAxon
Polarizability11.69 ųChemAxon
Number of Rings1ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Predicted Chromatographic Properties

Predicted Collision Cross Sections

PredictorAdduct TypeCCS Value (Å2)Reference
DeepCCS[M+H]+125.10230932474
DeepCCS[M-H]-121.92730932474
DeepCCS[M-2H]-158.81430932474
DeepCCS[M+Na]+133.95230932474
AllCCS[M+H]+125.432859911
AllCCS[M+H-H2O]+120.632859911
AllCCS[M+NH4]+130.032859911
AllCCS[M+Na]+131.332859911
AllCCS[M-H]-121.832859911
AllCCS[M+Na-2H]-123.832859911
AllCCS[M+HCOO]-126.132859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
IsonicotinamideNC(=O)C1=CC=NC=C12011.6Standard polar33892256
IsonicotinamideNC(=O)C1=CC=NC=C11333.0Standard non polar33892256
IsonicotinamideNC(=O)C1=CC=NC=C11394.4Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
Isonicotinamide,1TMS,isomer #1C[Si](C)(C)NC(=O)C1=CC=NC=C11450.2Semi standard non polar33892256
Isonicotinamide,1TMS,isomer #1C[Si](C)(C)NC(=O)C1=CC=NC=C11465.5Standard non polar33892256
Isonicotinamide,1TMS,isomer #1C[Si](C)(C)NC(=O)C1=CC=NC=C11810.8Standard polar33892256
Isonicotinamide,2TMS,isomer #1C[Si](C)(C)N(C(=O)C1=CC=NC=C1)[Si](C)(C)C1486.0Semi standard non polar33892256
Isonicotinamide,2TMS,isomer #1C[Si](C)(C)N(C(=O)C1=CC=NC=C1)[Si](C)(C)C1557.2Standard non polar33892256
Isonicotinamide,2TMS,isomer #1C[Si](C)(C)N(C(=O)C1=CC=NC=C1)[Si](C)(C)C1766.7Standard polar33892256
Isonicotinamide,1TBDMS,isomer #1CC(C)(C)[Si](C)(C)NC(=O)C1=CC=NC=C11678.5Semi standard non polar33892256
Isonicotinamide,1TBDMS,isomer #1CC(C)(C)[Si](C)(C)NC(=O)C1=CC=NC=C11643.7Standard non polar33892256
Isonicotinamide,1TBDMS,isomer #1CC(C)(C)[Si](C)(C)NC(=O)C1=CC=NC=C11980.0Standard polar33892256
Isonicotinamide,2TBDMS,isomer #1CC(C)(C)[Si](C)(C)N(C(=O)C1=CC=NC=C1)[Si](C)(C)C(C)(C)C1938.7Semi standard non polar33892256
Isonicotinamide,2TBDMS,isomer #1CC(C)(C)[Si](C)(C)N(C(=O)C1=CC=NC=C1)[Si](C)(C)C(C)(C)C1955.6Standard non polar33892256
Isonicotinamide,2TBDMS,isomer #1CC(C)(C)[Si](C)(C)N(C(=O)C1=CC=NC=C1)[Si](C)(C)C(C)(C)C1997.3Standard polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - Isonicotinamide GC-MS (Non-derivatized) - 70eV, Positivesplash10-05fr-5900000000-882fd7188a35d0a2c4942021-09-23Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - Isonicotinamide GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum

MS/MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 10V, Positive-QTOFsplash10-00di-0900000000-c6ec1f8e0af2c607aef72016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 20V, Positive-QTOFsplash10-00di-4900000000-70133c9367901f7e53d22016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 40V, Positive-QTOFsplash10-0pir-9600000000-b0a91c790242d0954ea12016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 10V, Negative-QTOFsplash10-00di-1900000000-e2161dce8c8f0a8953372016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 20V, Negative-QTOFsplash10-00fr-7900000000-860832b023f2a6316edb2016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 40V, Negative-QTOFsplash10-0006-9000000000-3f758d54a52096aa30f42016-08-03Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 10V, Positive-QTOFsplash10-05fr-1900000000-27b9dca9392e07e57ff32021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 20V, Positive-QTOFsplash10-0a4i-6900000000-c2785894ed71f3a781762021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 40V, Positive-QTOFsplash10-0fb9-9000000000-68b3f262a7ca58cb33812021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 10V, Negative-QTOFsplash10-00b9-9500000000-700d9e18eab71ed8dda02021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 20V, Negative-QTOFsplash10-004i-9000000000-c3dca6c45579e23f078c2021-10-12Wishart LabView Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - Isonicotinamide 40V, Negative-QTOFsplash10-0006-9000000000-fb6155d506c37b3bff372021-10-12Wishart 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 IDNot Available
KEGG Compound IDC02421
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkIsonicotinamide
METLIN IDNot Available
PubChem Compound15074
PDB IDNot Available
ChEBI ID6031
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 ]