MK-4541 is a selective, orally bioactive androgen receptor (AR) modulator. MK-4541 works as an antagonist to inhibit 5α-reductase. MK-4541 suppresses the proliferation/growth and causes apoptosis of AR-positive prostate cancer/tumor cells. MK-4541 significantly suppresses the growth of R3327-G prostate tumors in mouse xenograft models.

Physicochemical Properties

Molecular Formula	C22H31F3N2O3
Molecular Weight	428.4884
Exact Mass	428.228
CAS #	796885-38-6
PubChem CID	59691338
Appearance	Typically exists as solid at room temperature
LogP	4.7
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	3
Heavy Atom Count	30
Complexity	754
Defined Atom Stereocenter Count	7
SMILES	C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@@H]2NC(=O)OCC(F)(F)F)CC[C@@H]4[C@@]3(C=CC(=O)N4C)C
InChi Key	OGBFNZPDLOPGEO-OCWMMRLVSA-N
InChi Code	InChI=1S/C22H31F3N2O3/c1-20-10-8-15-13(4-7-17-21(15,2)11-9-18(28)27(17)3)14(20)5-6-16(20)26-19(29)30-12-22(23,24)25/h9,11,13-17H,4-8,10,12H2,1-3H3,(H,26,29)/t13-,14-,15-,16-,17+,20-,21+/m0/s1
Chemical Name	2,2,2-trifluoroethyl N-[(1S,3aS,3bS,5aR,9aR,9bS,11aS)-6,9a,11a-trimethyl-7-oxo-2,3,3a,3b,4,5,5a,9b,10,11-decahydro-1H-indeno[5,4-f]quinolin-1-yl]carbamate
Synonyms	MK 4541; MK4541; MK-4541
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 athymic nude mice with gunshot tumors, MK-4541 (100 mg/kg; once daily, five times weekly for five weeks) slows the growth of R-3327-G cells [1]. MK-4541 exhibits anti-androgenic effects on the seminal vesicles, lowering testosterone levels in males and suppressing Ki67 expression [1]. It is administered five times a week for five weeks at doses of 15 mg/kg, 50 mg, or 200 mg/kg.
Animal Protocol	Animal/Disease Models: R3327-G prostate tumor xenograft mouse model [1] Doses: 25 mg/kg, 50 mg/kg, 100 mg/kg, 200 mg/kg Route of Administration: po (oral gavage); one time/day, weekly 5 times for 5 weeks. Experimental Results: 100 mg/kg Dramatically inhibited tumor growth and diminished plasma testosterone concentration and Ki67 expression.
References	[1]. A novel selective androgen receptor modulator (SARM) MK-4541 exerts anti-androgenic activity in the prostate cancer xenograft R-3327G and anabolic activity on skeletal muscle mass & function in castrated mice. J Steroid Biochem Mol Biol. 2016 Oct;163:88-97.
Additional Infomation	MK-4541 is a 4-azasteroid and a selective androgen receptor modulator (SARM). MK-4541 acts as a dual selective SARM and is both a potent androgen receptor antagonist and a 5α-reductase inhibitor.

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	2.3338 mL	11.6689 mL	23.3378 mL
	5 mM	0.4668 mL	2.3338 mL	4.6676 mL
	10 mM	0.2334 mL	1.1669 mL	2.3338 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.