Ivaltinostat (CG-200745) is an orally bioactive pan-HDAC inhibitor (antagonist) with a hydroxamic acid moiety that binds zinc at the base of the catalytic pocket. Ivaltinostat inhibits the deacetylation of histone H3 and tubulin. Ivaltinostat induces the accumulation of p53, promotes p53-dependent transactivation, and enhances the expression of MDM2 and p21 (Waf1/Cip1) proteins. Ivaltinostat enhances the sensitivity of Gemcitabine-resistant cells to Gemcitabine and 5-Fluorouracil (5-FU). Ivaltinostat causes apoptosis and has anti-tumor activities.

Physicochemical Properties

Molecular Formula	C24H33N3O4
Molecular Weight	427.54
Exact Mass	427.247
CAS #	936221-33-9
Related CAS #	Ivaltinostat formic
PubChem CID	16117309
Appearance	Typically exists as solid at room temperature
Density	1.148±0.06 g/cm3 (20 °C, 760 mmHg)
LogP	4.06
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	13
Heavy Atom Count	31
Complexity	579
Defined Atom Stereocenter Count	0
SMILES	O(C1C=CC=C2C=CC=CC=12)C/C(/C(NCCCN(C)C)=O)=C\CCCCC(NO)=O
InChi Key	AUGCSOFQTDKPSO-RGVLZGJSSA-N
InChi Code	InChI=1S/C24H33N3O4/c1-27(2)17-9-16-25-24(29)20(11-4-3-5-15-23(28)26-30)18-31-22-14-8-12-19-10-6-7-13-21(19)22/h6-8,10-14,30H,3-5,9,15-18H2,1-2H3,(H,25,29)(H,26,28)/b20-11+
Chemical Name	(E)-N-[3-(dimethylamino)propyl]-N'-hydroxy-2-(naphthalen-1-yloxymethyl)oct-2-enediamide
Synonyms	CG 200745 CG-200745 CG200745
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

Targets	HDAC; p53; p38 MAP kinase
ln Vitro	CG-200745 (0-10 μM; 48 hours) reduces the Calu6 cells proliferation to 40% of untreated cells[1]. CG-200745 (3 μM; 1-24 hours) significantly increases Calu6 cells proportion in G2/M phase (69%)[1]. CG-200745 (0-10 μM; 1-24 hours) treatment with low concentration significantly increases the acetylation of histone H3 and H4 in Calu6 cells at various sites in a time-dependent manner up to 24 hours after treatment[1]. Cell Proliferation Assay[1] Cell Line: Calu6 cells Concentration: 0-10 μM Incubation Time: 48 hours Result: Reduced the cell proliferation to 40% of untreated cells. Cell Cycle Analysis[1] Cell Line: Calu6 cells Concentration: 3 μM Incubation Time: 1, 8, 12, 24 hours Result: Increased significantly cell proportion in G2/M phase (69%). Western Blot Analysis[1] Cell Line: Calu6 cells Concentration: 0-10 μM Incubation Time: 1, 4, 8, 12, 24 hours Result: Increased the acetylation of histone H3 and H4 at various sites in a time-dependent manner.
ln Vivo	CG-200745 (p.o.; 30 mg/kg/day; for 7 days) attenuates oxidative stress, inflammatory cytokines, and adhesion molecules in UUO kidneys[2]. Animal Model: Male 8-week-old C57BL/6 J mice weighing 20~22 g of unilateral ureteral obstruction (UUO)[2] Dosage: 30 mg/kg Administration: P.o.; daily; for 7 days Result: Attenuated oxidative stress, inflammatory cytokines and adhesion molecules in UUO kidneys.
References	[1].Epigenetic modulation with HDAC inhibitor CG200745 induces anti-proliferation in non-small cell lung cancer cells. PLoS One. 2015 Mar 17;10(3):e0119379. [2].Histone deacetylase inhibitor, CG200745 attenuates renal fibrosis in obstructive kidney disease. Sci Rep. 2018 Aug 1;8(1):11546.
Additional Infomation	Cg200745 has been used in trials studying the treatment of Solid Tumour. Ivaltinostat is a histone deacetylase (HDAC) inhibitor with potential antineoplastic activity. Ivaltinosta tinhibits the catalytic activity of HDAC, resulting in an accumulation of highly acetylated chromatin histones, followed by the induction of chromatin remodeling and an altered pattern of gene expression. In particular, this agent enhances the histone acetylation of the tumor suppressor gene p53. This results in an accumulation of p53, p53-dependent transactivation and apoptosis in tumor cells. HDAC, an enzyme upregulated in many tumor types, deacetylates chromatin histone proteins.

Solubility Data

Solubility (In Vitro)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.3390 mL	11.6948 mL	23.3896 mL
	5 mM	0.4678 mL	2.3390 mL	4.6779 mL
	10 mM	0.2339 mL	1.1695 mL	2.3390 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.