N(1),N(11)-Diethylnorspermine (DENSPM) is a potent inducer of the polyamine catabolic enzyme, spermidine/spermine N1-acetyltransferase. It is able to increase enzyme activity by 200-1000 fold.

Physicochemical Properties

Molecular Formula	C13H32N4
Molecular Weight	244.427
Exact Mass	388.169
CAS #	121749-39-1
Related CAS #	N1,N11-Diethylnorspermine tetrahydrochloride;156886-85-0
PubChem CID	4282
Appearance	Typically exists as solid at room temperature
Density	0.877 g/cm3
Boiling Point	357.1ºC at 760 mmHg
Flash Point	171.9ºC
Vapour Pressure	2.79E-05mmHg at 25°C
Index of Refraction	1.462
LogP	5.326
Hydrogen Bond Donor Count	4
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	14
Heavy Atom Count	17
Complexity	117
Defined Atom Stereocenter Count	0
SMILES	CCNCCCNCCCNCCCNCC
InChi Key	UMJJGDUYVQCBMC-UHFFFAOYSA-N
InChi Code	InChI=1S/C13H32N4/c1-3-14-8-5-10-16-12-7-13-17-11-6-9-15-4-2/h14-17H,3-13H2,1-2H3
Chemical Name	N-ethyl-N'-[3-[3-(ethylamino)propylamino]propyl]propane-1,3-diamine
Synonyms	DE-333 De 333 N(1),N(11)-Diethylnorspermine
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

ln Vivo	In mice containing DU-145 cell line xenografts, N1,N11-diethylnorspermine (40 mg/kg three times daily for two cycles every six days) dramatically inhibits tumor growth[1].
References	[1]. Schipper RG, et al. Antitumor activity of the polyamine analog N(1), N(11)-diethylnorspermine against human prostate carcinoma cells. Prostate. 2000 Sep 1;44(4):313-21. [2]. Holst CM, et al. Molecular mechanisms underlying N1, N11-diethylnorspermine-induced apoptosis in a human breast cancer cell line. Anticancer Drugs. 2008 Oct;19(9):871-83. [3]. Jiang R, et al. Activation of polyamine catabolism by N1,N11-diethylnorspermine leads to cell death in glioblastoma. Int J Oncol. 2007 Aug;31(2):431-40.
Additional Infomation	DENSPM is n(1),N(11)-bis(ethyl)norspermine (DENSPM), a N-terminally alkylated tetraamine and polyamine mimetics, disrupts polyamine pool homeostasis by modulating the activities of the biosynthetic enzymes, ornithine decarboxylase (ODC), and S-adenosylmethionine decarboxylase (AdoMetDC). Diethylnorspermine is a synthetic bis-ethyl analogue of spermine with potential antineoplastic activity. N(1),N(11)-bis(ethyl)norspermine (DENSPM), a N-terminally alkylated tetraamine and polyamine mimetics, disrupts polyamine pool homeostasis by modulating the activities of the biosynthetic enzymes, ornithine decarboxylase (ODC), and S-adenosylmethionine decarboxylase (AdoMetDC). This agent also reduces polyamine concentrations through the induction of the catabolic enzyme spermidine/spermine N1-acetyltransferase 1 (SSAT). Polyamines, an integral part of the DNA helix structure, play a critical role in cell division, differentiation and membrane function. Disruption of normal polyamine concentrations by DENSPM may lead to cell growth inhibition. Drug Indication Investigated for use/treatment in renal cell carcinoma, pancreatic cancer, melanoma, and lung cancer.

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	4.0912 mL	20.4558 mL	40.9115 mL
	5 mM	0.8182 mL	4.0912 mL	8.1823 mL
	10 mM	0.4091 mL	2.0456 mL	4.0912 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.