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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2021-09-11 14:41:23 UTC
Update Date2021-09-26 23:09:41 UTC
HMDB IDHMDB0255119
Secondary Accession NumbersNone
Metabolite Identification
Common NameN-Desmethyl Topotecan
Description19-ethyl-7,19-dihydroxy-8-[(methylamino)methyl]-17-oxa-3,13-diazapentacyclo[11.8.0.0²,¹¹.0⁴,⁹.0¹⁵,²⁰]henicosa-1(21),2,4,6,8,10,15(20)-heptaene-14,18-dione belongs to the class of organic compounds known as camptothecins. These are heterocyclic compounds comprising a planar pentacyclic ring structure, that includes a pyrrolo[3,4-beta]-quinoline moiety (rings A, B and C), conjugated pyridone moiety (ring D) and one chiral center at position 20 within the alpha-hydroxy lactone ring with (S) configuration (the E-ring). Based on a literature review very few articles have been published on 19-ethyl-7,19-dihydroxy-8-[(methylamino)methyl]-17-oxa-3,13-diazapentacyclo[11.8.0.0²,¹¹.0⁴,⁹.0¹⁵,²⁰]henicosa-1(21),2,4,6,8,10,15(20)-heptaene-14,18-dione. This compound has been identified in human blood as reported by (PMID: 31557052 ). N-desmethyl topotecan is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically N-Desmethyl Topotecan 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
SynonymsNot Available
Chemical FormulaC22H21N3O5
Average Molecular Weight407.426
Monoisotopic Molecular Weight407.148120788
IUPAC Name19-ethyl-7,19-dihydroxy-8-[(methylamino)methyl]-17-oxa-3,13-diazapentacyclo[11.8.0.0^{2,11}.0^{4,9}.0^{15,20}]henicosa-1(21),2(11),3,5,7,9,15(20)-heptaene-14,18-dione
Traditional Name19-ethyl-7,19-dihydroxy-8-[(methylamino)methyl]-17-oxa-3,13-diazapentacyclo[11.8.0.0^{2,11}.0^{4,9}.0^{15,20}]henicosa-1(21),2(11),3,5,7,9,15(20)-heptaene-14,18-dione
CAS Registry NumberNot Available
SMILES
CCC1(O)C(=O)OCC2=C1C=C1N(CC3=C1N=C1C=CC(O)=C(CNC)C1=C3)C2=O
InChI Identifier
InChI=1S/C22H21N3O5/c1-3-22(29)15-7-17-19-11(9-25(17)20(27)14(15)10-30-21(22)28)6-12-13(8-23-2)18(26)5-4-16(12)24-19/h4-7,23,26,29H,3,8-10H2,1-2H3
InChI KeyZWUJOGCYOWLZFL-UHFFFAOYSA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as camptothecins. These are heterocyclic compounds comprising a planar pentacyclic ring structure, that includes a pyrrolo[3,4-beta]-quinoline moiety (rings A, B and C), conjugated pyridone moiety (ring D) and one chiral center at position 20 within the alpha-hydroxy lactone ring with (S) configuration (the E-ring).
KingdomOrganic compounds
Super ClassAlkaloids and derivatives
ClassCamptothecins
Sub ClassNot Available
Direct ParentCamptothecins
Alternative Parents
Substituents
  • Camptothecin
  • Hydroxyquinoline
  • Pyranopyridine
  • Quinoline
  • 1-hydroxy-2-unsubstituted benzenoid
  • Phenol
  • Pyridinone
  • Aralkylamine
  • Benzenoid
  • Pyridine
  • Heteroaromatic compound
  • Tertiary alcohol
  • Carboxylic acid ester
  • Lactam
  • Lactone
  • Amino acid or derivatives
  • Oxacycle
  • Azacycle
  • Carboxylic acid derivative
  • Organoheterocyclic compound
  • Secondary aliphatic amine
  • Secondary amine
  • Monocarboxylic acid or derivatives
  • Alcohol
  • Organic nitrogen compound
  • Carbonyl group
  • Organic oxide
  • Hydrocarbon derivative
  • Organonitrogen compound
  • Organooxygen compound
  • Amine
  • Organic oxygen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic 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
logP1.29ALOGPS
logP-0.66ChemAxon
logS-2.9ALOGPS
pKa (Strongest Acidic)7.85ChemAxon
pKa (Strongest Basic)10.49ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count6ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area111.99 ŲChemAxon
Rotatable Bond Count3ChemAxon
Refractivity109.72 m³·mol⁻¹ChemAxon
Polarizability43.04 ųChemAxon
Number of Rings5ChemAxon
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]+200.73930932474
DeepCCS[M-H]-198.38130932474
DeepCCS[M-2H]-232.0330932474
DeepCCS[M+Na]+207.25830932474
AllCCS[M+H]+193.832859911
AllCCS[M+H-H2O]+191.532859911
AllCCS[M+NH4]+196.032859911
AllCCS[M+Na]+196.632859911
AllCCS[M-H]-191.732859911
AllCCS[M+Na-2H]-191.632859911
AllCCS[M+HCOO]-191.532859911

Predicted Kovats Retention Indices

Underivatized

MetaboliteSMILESKovats RI ValueColumn TypeReference
N-Desmethyl TopotecanCCC1(O)C(=O)OCC2=C1C=C1N(CC3=C1N=C1C=CC(O)=C(CNC)C1=C3)C2=O4607.8Standard polar33892256
N-Desmethyl TopotecanCCC1(O)C(=O)OCC2=C1C=C1N(CC3=C1N=C1C=CC(O)=C(CNC)C1=C3)C2=O3400.9Standard non polar33892256
N-Desmethyl TopotecanCCC1(O)C(=O)OCC2=C1C=C1N(CC3=C1N=C1C=CC(O)=C(CNC)C1=C3)C2=O4192.0Semi standard non polar33892256

Derivatized

Derivative Name / StructureSMILESKovats RI ValueColumn TypeReference
N-Desmethyl Topotecan,3TMS,isomer #1CCC1(O[Si](C)(C)C)C(=O)OCC2=C1C=C1C3=NC4=CC=C(O[Si](C)(C)C)C(CN(C)[Si](C)(C)C)=C4C=C3CN1C2=O3689.0Semi standard non polar33892256
N-Desmethyl Topotecan,3TMS,isomer #1CCC1(O[Si](C)(C)C)C(=O)OCC2=C1C=C1C3=NC4=CC=C(O[Si](C)(C)C)C(CN(C)[Si](C)(C)C)=C4C=C3CN1C2=O3834.2Standard non polar33892256
N-Desmethyl Topotecan,3TMS,isomer #1CCC1(O[Si](C)(C)C)C(=O)OCC2=C1C=C1C3=NC4=CC=C(O[Si](C)(C)C)C(CN(C)[Si](C)(C)C)=C4C=C3CN1C2=O4436.3Standard polar33892256
N-Desmethyl Topotecan,3TBDMS,isomer #1CCC1(O[Si](C)(C)C(C)(C)C)C(=O)OCC2=C1C=C1C3=NC4=CC=C(O[Si](C)(C)C(C)(C)C)C(CN(C)[Si](C)(C)C(C)(C)C)=C4C=C3CN1C2=O4271.4Semi standard non polar33892256
N-Desmethyl Topotecan,3TBDMS,isomer #1CCC1(O[Si](C)(C)C(C)(C)C)C(=O)OCC2=C1C=C1C3=NC4=CC=C(O[Si](C)(C)C(C)(C)C)C(CN(C)[Si](C)(C)C(C)(C)C)=C4C=C3CN1C2=O4438.7Standard non polar33892256
N-Desmethyl Topotecan,3TBDMS,isomer #1CCC1(O[Si](C)(C)C(C)(C)C)C(=O)OCC2=C1C=C1C3=NC4=CC=C(O[Si](C)(C)C(C)(C)C)C(CN(C)[Si](C)(C)C(C)(C)C)=C4C=C3CN1C2=O4566.7Standard polar33892256
Spectra

GC-MS Spectra

Spectrum TypeDescriptionSplash KeyDeposition DateSourceView
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (Non-derivatized) - 70eV, Positivesplash10-01si-0019000000-9f5738567a0fa08115132021-09-23Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (Non-derivatized) - 70eV, PositiveNot Available2021-10-12Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TMS_1_1) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TMS_1_2) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TMS_1_3) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TMS_2_1) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TMS_2_2) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TMS_2_3) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TBDMS_1_1) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TBDMS_1_2) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TBDMS_1_3) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TBDMS_2_1) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TBDMS_2_2) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - N-Desmethyl Topotecan GC-MS (TBDMS_2_3) - 70eV, PositiveNot Available2021-11-04Wishart LabView Spectrum

NMR Spectra

Spectrum TypeDescriptionDeposition DateSourceView
Predicted 1D NMR13C NMR Spectrum (1D, 100 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 100 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 1000 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 1000 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 200 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 200 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 300 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 300 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 400 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 400 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 500 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 500 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 600 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 600 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 700 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 700 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 800 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 800 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR1H NMR Spectrum (1D, 900 MHz, D2O, predicted)2021-10-25Wishart LabView Spectrum
Predicted 1D NMR13C NMR Spectrum (1D, 900 MHz, D2O, predicted)2021-10-25Wishart 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 ID28552638
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound75085602
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 ]