Entinostat

Entinostat
Names

Preferred IUPAC name (Pyridin-3-yl)methyl ({4-[(2-aminophenyl)carbamoyl]phenyl}methyl)carbamate
Other names SNDX-275; MS-275
Identifiers
CAS Number	209783-80-2^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:132082^N
ChEMBL	ChEMBL27759^N
ChemSpider	4111^N
ECHA InfoCard	100.158.999
IUPHAR/BPS	7007
KEGG	D09338^Y
PubChem CID	4261
UNII	1ZNY4FKK9H^Y
CompTox Dashboard (EPA)	DTXSID0041068
InChI InChI=1S/C21H20N4O3/c22-18-5-1-2-6-19(18)25-20(26)17-9-7-15(8-10-17)13-24-21(27)28-14-16-4-3-11-23-12-16/h1-12H,13-14,22H2,(H,24,27)(H,25,26)^N Key: INVTYAOGFAGBOE-UHFFFAOYSA-N^N InChI=1/C21H20N4O3/c22-18-5-1-2-6-19(18)25-20(26)17-9-7-15(8-10-17)13-24-21(27)28-14-16-4-3-11-23-12-16/h1-12H,13-14,22H2,(H,24,27)(H,25,26) Key: INVTYAOGFAGBOE-UHFFFAOYAU
SMILES C1=CC=C(C(=C1)N)NC(=O)C2=CC=C(C=C2)CNC(=O)OCC3=CN=CC=C3
Properties
Chemical formula	C₂₁H₂₀N₄O₃
Molar mass	376.4085 g/mol
Pharmacology
ATC code	L01XH05 (WHO)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references

Chemical compound

Entinostat, also known as SNDX-275 and MS-275, is a benzamide histone deacetylase inhibitor undergoing clinical trials for treatment of various cancers.^[1]^[2]^[3]^[4]

Entinostat inhibits class I HDAC1 and HDAC3 with IC₅₀ of 0.51 μM and 1.7 μM, respectively.^[5]

Syndax pharmaceuticals currently holds the rights to entinostat and recently received $26.6 million in funds to advance treatments of resistant cancers using epigenetic tools.^[6]

It has also been investigated as a potential male contraceptive drug.^[7]

References

^ Juergens RA, Vendetti F, Coleman B, Sebree RS, Rudek MA, Belinsky SA, et al. (May 2008). "Phase I trial of 5-azacitidine (5AC) and SNDX-275 in advanced lung cancer (NSCLC)". Journal of Clinical Oncology. 26 (15_suppl): 19036-. doi:10.1200/jco.2008.26.15_suppl.19036.
^ Kiany S, Harrison D, Gordon N (2020). "The Histone Deacetylase Inhibitor Entinostat/Syndax 275 in Osteosarcoma". Current Advances in Osteosarcoma. Advances in Experimental Medicine and Biology. Vol. 1257. pp. 75–83. doi:10.1007/978-3-030-43032-0_7. ISBN 978-3-030-43031-3. PMID 32483732. S2CID 219169967.
^ Wang Y, Xie Q, Tan H, Liao M, Zhu S, Zheng LL, et al. (November 2021). "Targeting cancer epigenetic pathways with small-molecule compounds: Therapeutic efficacy and combination therapies". Pharmacological Research. 173: 105702. doi:10.1016/j.phrs.2021.105702. PMID 34102228. S2CID 235378858.
^ Lian B, Chen X, Shen K (2023). "Inhibition of histone deacetylases attenuates tumor progression and improves immunotherapy in breast cancer". Frontiers in Immunology. 14: 1164514. doi:10.3389/fimmu.2023.1164514. PMC 10034161. PMID 36969235.
^ US 2009/0263353, Maier T, Beckers T, Hummel RP, Feth M, Muller M, Bar T, Volz J, "Novel Sulphonylpyrroles as Inhibitors of Hdac S Novel Sulphonylpyrroles", issued 31 July 2012, assigned to 4SC AG
^ "Company Prepares for Pivotal Phase 3 Study of Entinostat, Most Advanced HDAC Inhibitor in Development for ER+ Metastatic Breast Cancer" (PDF). Syndax Pharmaceuticals. 27 August 2013. Archived from the original (PDF) on 17 June 2016.
^ Hong SH, Castro G, Wang D, Nofsinger R, Kane M, Folias A, et al. (February 2024). "Targeting nuclear receptor corepressors for reversible male contraception". Proceedings of the National Academy of Sciences of the United States of America. 121 (9): e2320129121. doi:10.1073/pnas.2320129121. PMID 38377195.

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 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 (Mitoxantrone Losoxantrone 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 Umbralisib^‡)
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 Elesclomol^§ Elsamitrucin Enasidenib Epacadostat Eribulin Estramustine phosphate Glasdegib Idecabtagene vicleucel Ivosidenib Lifileucel Lonidamine Lucanthone Lurbinectedin Mitoguazone Mitotane Oblimersen^† Omacetaxine mepesuccinate Plitidepsin 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

v t e Histone deacetylase inhibitors
3,3'-Diindolylmethane β-Hydroxybutyric acid (β-hydroxybutyrate) Abexinostat Acetoacetic acid (acetoacetate) Allyl mercaptan Apicidin Belinostat Butyric acid (butyrate) Capsaicin Citarinostat Curcumin Diallyl disulfide Entinostat Fimepinostat Givinostat Indole-3-carbinol Kevetrin Martinostat Mocetinostat Niacinamide Panobinostat Parthenolide Phenylbutyrate Pracinostat Quisinostat Resminostat Romidepsin Scriptaid Sodium butyrate Sodium oxybate (GHB sodium) Sodium phenylbutyrate Sodium valproate Sulforaphane Trapoxin B Trichostatin A Tucidinostat Valnoctamide Valproic acid (valproate) Valproate pivoxil Valproate semisodium Valpromide Vorinostat (SAHA)
See also: Receptor/signaling modulators

Histone deacetylase inhibitors