Belotecan - Misplaced Pages

Chemical compound Pharmaceutical compound

Belotecan
Clinical data

ATC code	L01CE04 (WHO)
Identifiers
IUPAC name (4S)-4-Ethyl-4-hydroxy-11--1H-pyranoindolizinoquinoline-3,14(4H,12H)-dione
CAS Number	256411-32-2
PubChem CID	6456014
DrugBank	DB12459
ChemSpider	4958253
UNII	27Z82M2G1N
KEGG	D03225
ChEMBL	ChEMBL2107315
CompTox Dashboard (EPA)	DTXSID60180332
Chemical and physical data
Formula	C₂₅H₂₇N₃O₄
Molar mass	433.508 g·mol
3D model (JSmol)	Interactive image
SMILES O=C\1N4\C(=C/C2=C/1COC(=O)2(O)CC)c3nc5c(c(c3C4)CCNC(C)C)cccc5
InChI InChI=1S/C25H27N3O4/c1-4-25(31)19-11-21-22-17(12-28(21)23(29)18(19)13-32-24(25)30)15(9-10-26-14(2)3)16-7-5-6-8-20(16)27-22/h5-8,11,14,26,31H,4,9-10,12-13H2,1-3H3/t25-/m0/s1 Key:LNHWXBUNXOXMRL-VWLOTQADSA-N
(verify)

Belotecan is a drug used in chemotherapy. It is a semi-synthetic camptothecin analogue indicated for small-cell lung cancer and ovarian cancer, approved in South Korea under the trade name Camtobell, presented in 2 mg vials for injection. The drug has been marketed by Chong Kun Dang Pharmaceuticals since 2003.

Mechanism of action

Belotecan blocks topoisomerase I with a pIC₅₀ of 6.56, stabilizing the cleavable complex of topoisomerase I-DNA, which inhibits the religation of single-stranded DNA breaks generated by topoisomerase I; lethal double-stranded DNA breaks occur when the topoisomerase I-DNA complex is encountered by the DNA replication machinery, DNA replication is disrupted, and the tumor cell undergoes apoptosis. Topoisomerase I is an enzyme that mediates reversible single-strand breaks in DNA during DNA replication.

References

"Camtobell Inj. 2mg". Chong Kun Dang pharmaceutical Corp. Archived from the original on 12 November 2016.
"Camtobell Inj. 2mg". Chong Kun Dang pharmaceutical Corp. Archived from the original on 12 November 2016.
Sahoo U, ed. (2012). Clinical Research in Asia: Opportunities and Challenges. Oxford: Woodhead Publishing Limited. p. 152. ISBN 978-1-908818-13-3. New drugs approved in South Korea
"Belotecan". drugcentral.org. UNM School of Medicine. 2016-07-31. Retrieved 2016-11-12.
Li F, Jiang T, Li Q, Ling X (2017). "Camptothecin (CPT) and its derivatives are known to target topoisomerase I (Top1) as their mechanism of action: did we miss something in CPT analogue molecular targets for treating human disease such as cancer?". American Journal of Cancer Research. 7 (12): 2350–2394. PMC 5752681. PMID 29312794.

Intracellular chemotherapeutic agents / antineoplastic agents (L01)

SPs/MIs
(M phase)

Block microtubule assembly	Vinca alkaloids (Vinblastine Vincristine Vindesine Vinflunine Vinorelbine)
Block microtubule disassembly	Taxanes (Cabazitaxel Docetaxel Larotaxel Ortataxel Paclitaxel Tesetaxel) Epothilones (Ixabepilone)

DNA replication
inhibitor

DNA precursors/
antimetabolites
(S phase)

Folic acid	Dihydrofolate reductase inhibitor (Aminopterin Methotrexate Pemetrexed Pralatrexate) Thymidylate synthase inhibitor (Pemetrexed Raltitrexed)
Purine	Adenosine deaminase inhibitor (Pentostatin) Halogenated/ribonucleotide reductase inhibitors (Cladribine Clofarabine Fludarabine) Nelarabine Rabacfosadine Thiopurine (Mercaptopurine Tioguanine)
Pyrimidine	Thymidylate synthase inhibitor (Capecitabine Carmofur Doxifluridine Floxuridine Fluorouracil Tegafur (+gimeracil/oteracil)) DNA polymerase inhibitor (Cytarabine +daunorubicin) Ribonucleotide reductase inhibitor (Gemcitabine) Hypomethylating agent (Azacitidine Decitabine)
Deoxyribonucleotide	Ribonucleotide reductase inhibitor (Hydroxycarbamide)

Topoisomerase inhibitors
(S phase)

I	Camptotheca (Belotecan Camptothecin Cositecan Etirinotecan pegol Exatecan Gimatecan Irinotecan Lurtotecan Rubitecan Silatecan Topotecan)
II	Podophyllum (Etoposide Teniposide)
II+Intercalation	Anthracyclines (Aclarubicin Amrubicin Daunorubicin (+cytarabine) Doxorubicin Epirubicin Idarubicin Pirarubicin Valrubicin Zorubicin) Anthracenediones (Losoxantrone Mitoxantrone Pixantrone) Amsacrine Bisantrene Crisnatol Menogaril

Crosslinking of DNA
(CCNS)

Alkylating	Nitrogen mustards: Bendamustine Chlormethine Cyclophosphamide (Ifosfamide Trofosfamide) Chlorambucil Melphalan (Melphalan flufenamide) Prednimustine Uramustine Nitrosoureas: Carmustine Fotemustine Lomustine (Semustine) Nimustine Ranimustine Streptozocin Alkyl sulfonates: Busulfan (Mannosulfan Treosulfan) Aziridines: Carboquone Thiotepa Triaziquone Triethylenemelamine
Platinum-based	Carboplatin Cisplatin Dicycloplatin Nedaplatin Oxaliplatin Satraplatin
Nonclassical	Altretamine Hydrazines (Procarbazine) Etoglucid Mitobronitol Pipobroman Triazenes (Dacarbazine Mitozolomide Temozolomide)
Intercalation	Streptomyces (Dactinomycin Bleomycin Mitomycins Plicamycin)

Photosensitizers/PDT

Other

Enzyme inhibitors	FI (Tipifarnib) CDK inhibitors (Abemaciclib Alvocidib Palbociclib Ribociclib Seliciclib) PrI Bortezomib Carfilzomib Oprozomib Ixazomib PhI (Anagrelide) IMPDI (Tiazofurin) LI (Masoprocol) PARP inhibitor (Fuzuloparib Niraparib +abiraterone acetate Olaparib Rucaparib) HDAC (Belinostat Entinostat Panobinostat Romidepsin Vorinostat) PIKI (Pi3K) (Alpelisib Copanlisib Duvelisib Idelalisib Inavolisib Umbralisib) IDH (Enasidenib Ivosidenib Olutasidenib Vorasidenib)
Receptor antagonists	ERA (Atrasentan) Retinoid X receptor (Bexarotene) Sex steroid (Testolactone)
Other/ungrouped	Adagrasib Aflibercept Arsenic trioxide Asparagine depleters (Asparaginase/Pegaspargase) Axicabtagene ciloleucel Belzutifan Bexarotene Brexucabtagene autoleucel Celecoxib Ciltacabtagene autoleucel Demecolcine Denileukin diftitox Eflornithine Elesclomol Elsamitrucin Epacadostat Eribulin Estramustine Glasdegib Idecabtagene vicleucel Imetelstat Lifileucel Lisocabtagene maraleucel Lonidamine Lucanthone Lurbinectedin Mitoguazone Mitotane Nadofaragene firadenovec Navitoclax Obecabtagene autoleucel Oblimersen Omacetaxine mepesuccinate Plitidepsin Tabelecleucel Retinoids (Alitretinoin Tretinoin) Selinexor Sitimagene ceradenovec Sotorasib Tagraxofusp Talimogene laherparepvec Tazemetostat Tebentafusp Tiazofurine Tigilanol tiglate Tisagenlecleucel Trabectedin Veliparib Venetoclax Verdinexor Vosaroxin

WHO-EM
Withdrawn from market
Clinical trials:
- Phase III
- Never to phase III

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