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Record Information
Version2.0
Created at2022-09-09 01:24:01 UTC
Updated at2022-09-09 01:24:01 UTC
NP-MRD IDNP0276993
Secondary Accession NumbersNone
Natural Product Identification
Common Name7-ethyl-10-hydroxycamptothecin
DescriptionSN-38, also known as sn 38 or irrinotecan, 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). SN-38 is a strong basic compound (based on its pKa). Click on genes, proteins and metabolites below to link to respective articles. SN-38 exists in all living organisms, ranging from bacteria to humans. In vitro cytotoxicity assays show that the potency of SN-38 relative to irinotecan varies from 2- to 2000-fold. Within humans, SN-38 participates in a number of enzymatic reactions. In particular, SN-38 can be biosynthesized from irinotecan; which is mediated by the enzymes liver carboxylesterase 1 and cocaine esterase. In addition, SN-38 and uridine diphosphate glucuronic acid can be converted into sn-38 glucuronide and uridine 5'-diphosphate; which is catalyzed by the enzymes UDP-glucuronosyltransferase 1-10 and UDP-glucuronosyltransferase 1-1. SN38 is formed via hydrolysis of irinotecan by carboxylesterases and metabolized via glucuronidation by UGT1A1. In humans, SN-38 is involved in irinotecan action pathway. The variant of UGT1A1 in ~10% of Caucasians which leads to poor metabolism of SN-38 predicts irinotecan toxicity, as it is then less easily excreted from the body in its SN-38 glucuronide form. SN-38 and its glucuronide are lost into the bile and intestines. It can cause the symptoms of diarrhoea and myelosuppression experienced by ~25% of the patients administered irinotecan. It is the active metabolite of irinotecan (an analog of camptothecin - a topoisomerase I inhibitor) but has 1000 times more activity than irinotecan itself. 7-ethyl-10-hydroxycamptothecin is found in Apis cerana. 7-ethyl-10-hydroxycamptothecin was first documented in 2013 (PMID: 23233044). SN-38 is an antineoplastic drug (PMID: 23384250) (PMID: 22882086) (PMID: 22454224).
Structure
Thumb
Synonyms
ValueSource
10-Hydroxy-7-ethylcamptothecinChEBI
7-Ethyl-10-hydroxy-20(S)-camptothecinChEBI
7-Ethyl-10-hydroxycamptothecinChEBI
sn 38ChEBI
sn 38 LactoneChEBI
CPT 11HMDB
CamptosarHMDB
IrrinotecanHMDB
Camptothecin-11HMDB
Irinotecan hydrochlorideHMDB
CPT-11HMDB
sn38 CPDHMDB
IrinotecanHMDB
NK012 CompoundHMDB
CPT11MeSH
7 Ethyl 10 hydroxycamptothecinMeSH
Camptothecin 11MeSH
Chemical FormulaC22H20N2O5
Average Mass392.4046 Da
Monoisotopic Mass392.13722 Da
IUPAC Name(19S)-10,19-diethyl-7,19-dihydroxy-17-oxa-3,13-diazapentacyclo[11.8.0.0²,¹¹.0⁴,⁹.0¹⁵,²⁰]henicosa-1(21),2(11),3,5,7,9,15(20)-heptaene-14,18-dione
Traditional Name7-ethyl-10-hydroxycamptothecin
CAS Registry NumberNot Available
SMILES
CCC1=C2C=C(O)C=CC2=NC2=C1CN1C2=CC2=C(COC(=O)[C@]2(O)CC)C1=O
InChI Identifier
InChI=1S/C22H20N2O5/c1-3-12-13-7-11(25)5-6-17(13)23-19-14(12)9-24-18(19)8-16-15(20(24)26)10-29-21(27)22(16,28)4-2/h5-8,25,28H,3-4,9-10H2,1-2H3/t22-/m0/s1
InChI KeyFJHBVJOVLFPMQE-QFIPXVFZSA-N
Experimental Spectra
Not Available
Predicted Spectra
Spectrum TypeDescriptionDepositor IDDepositor OrganizationDepositorDeposition DateView
1D NMR13C NMR Spectrum (1D, 25 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 100 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 252 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 1000 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 50 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 200 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 75 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 300 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 101 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 400 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 126 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 500 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 151 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 176 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 700 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 201 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 800 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR13C NMR Spectrum (1D, 226 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
1D NMR1H NMR Spectrum (1D, 900 MHz, H2O, predicted)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
Chemical Shift Submissions
Not Available
Species
Species of Origin
Species NameSourceReference
Apis ceranaLOTUS Database
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
  • Pyridinone
  • Pyridine
  • Benzenoid
  • Heteroaromatic compound
  • Tertiary alcohol
  • Carboxylic acid ester
  • Lactam
  • Lactone
  • Azacycle
  • Organoheterocyclic compound
  • Carboxylic acid derivative
  • Oxacycle
  • Monocarboxylic acid or derivatives
  • Organic nitrogen compound
  • Alcohol
  • Organic oxygen compound
  • Carbonyl group
  • Organonitrogen compound
  • Organooxygen compound
  • Organopnictogen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Physical Properties
StateNot Available
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP2.73ALOGPS
logP1.87ChemAxon
logS-3.1ALOGPS
pKa (Strongest Acidic)9.68ChemAxon
pKa (Strongest Basic)3.91ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count5ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area99.96 ŲChemAxon
Rotatable Bond Count2ChemAxon
Refractivity106.12 m³·mol⁻¹ChemAxon
Polarizability41.43 ųChemAxon
Number of Rings5ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
HMDB IDHMDB0060510
DrugBank IDDB05482
Phenol Explorer Compound IDNot Available
FoodDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID94634
KEGG Compound IDC11173
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkSN-38
METLIN IDNot Available
PubChem Compound104842
PDB IDNot Available
ChEBI ID8988
Good Scents IDNot Available
References
General References
  1. Sostelly A, Payen L, Guitton J, Di Pietro A, Falson P, Honorat M, Boumendjel A, Geze A, Freyer G, Tod M: Quantitative evaluation of the combination between cytotoxic drug and efflux transporter inhibitors based on a tumour growth inhibition model. Fundam Clin Pharmacol. 2014 Apr;28(2):161-9. doi: 10.1111/fcp.12005. Epub 2013 Feb 6. [PubMed:23384250 ]
  2. Yao Y, Su X, Xie Y, Wang Y, Kang T, Gou L, Yi C, Yang J: Synthesis, characterization, and antitumor evaluation of the albumin-SN38 conjugate. Anticancer Drugs. 2013 Mar;24(3):270-7. doi: 10.1097/CAD.0b013e32835c3543. [PubMed:23233044 ]
  3. Sostelly A, Payen L, Guitton J, Di Pietro A, Falson P, Honorat M, Valdameri G, Geze A, Boumendjel A, Freyer G, Tod M: A template model for studying anticancer drug efflux transporter inhibitors in vitro. Fundam Clin Pharmacol. 2013 Oct;27(5):544-56. doi: 10.1111/j.1472-8206.2012.01054.x. Epub 2012 Aug 8. [PubMed:22882086 ]
  4. Shimo T, Kurebayashi J, Kanomata N, Yamashita T, Kozuka Y, Moriya T, Sonoo H: Antitumor and anticancer stem cell activity of a poly ADP-ribose polymerase inhibitor olaparib in breast cancer cells. Breast Cancer. 2014 Jan;21(1):75-85. doi: 10.1007/s12282-012-0356-z. Epub 2012 Mar 28. [PubMed:22454224 ]
  5. LOTUS database [Link]