Abarelix (R3827) Acetate is a potent gonadotropin-releasing hormone (GnRH) antagonist utilized in study/research of prostate cancer.

Physicochemical Properties

Molecular Formula	C74H99CLN14O16
Molecular Weight	1476.11507725716
Exact Mass	1474.705
CAS #	547741-72-0
Related CAS #	Abarelix;183552-38-7
PubChem CID	16141059
Appearance	White to off-white solid powder
Hydrogen Bond Donor Count	14
Hydrogen Bond Acceptor Count	18
Rotatable Bond Count	38
Heavy Atom Count	105
Complexity	2800
Defined Atom Stereocenter Count	10
SMILES	C[C@H](C(=O)N)NC(=O)[C@@H]1CCCN1C(=O)[C@H](CCCCNC(C)C)NC(=O)[C@H](CC(C)C)NC(=O)[C@@H](CC(=O)N)NC(=O)[C@H](CC2=CC=C(C=C2)O)N(C)C(=O)[C@H](CO)NC(=O)[C@@H](CC3=CN=CC=C3)NC(=O)[C@@H](CC4=CC=C(C=C4)Cl)NC(=O)[C@@H](CC5=CC6=CC=CC=C6C=C5)NC(=O)C.CC(=O)O
InChi Key	ZRHCGBCCWJPSQF-JOOIWXSYSA-N
InChi Code	InChI=1S/C72H95ClN14O14.C2H4O2/c1-41(2)32-54(64(93)80-53(17-10-11-30-77-42(3)4)72(101)87-31-13-18-60(87)69(98)78-43(5)63(75)92)81-68(97)58(38-62(74)91)84-70(99)61(37-46-22-27-52(90)28-23-46)86(7)71(100)59(40-88)85-67(96)57(36-48-14-12-29-76-39-48)83-66(95)56(34-45-20-25-51(73)26-21-45)82-65(94)55(79-44(6)89)35-47-19-24-49-15-8-9-16-50(49)33-47;1-2(3)4/h8-9,12,14-16,19-29,33,39,41-43,53-61,77,88,90H,10-11,13,17-18,30-32,34-38,40H2,1-7H3,(H2,74,91)(H2,75,92)(H,78,98)(H,79,89)(H,80,93)(H,81,97)(H,82,94)(H,83,95)(H,84,99)(H,85,96);1H3,(H,3,4)/t43-,53+,54+,55-,56-,57-,58-,59+,60+,61+;/m1./s1
Chemical Name	(2R)-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-[[(2R)-2-[[(2R)-2-acetamido-3-naphthalen-2-ylpropanoyl]amino]-3-(4-chlorophenyl)propanoyl]amino]-3-pyridin-3-ylpropanoyl]amino]-3-hydroxypropanoyl]-methylamino]-3-(4-hydroxyphenyl)propanoyl]amino]-N-[(2S)-1-[[(2S)-1-[(2S)-2-[[(2R)-1-amino-1-oxopropan-2-yl]carbamoyl]pyrrolidin-1-yl]-1-oxo-6-(propan-2-ylamino)hexan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]butanediamide;acetic acid
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 Note: Please store this product in a sealed and protected environment, avoid exposure to moisture.
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	GnRH[1]
References	[1]. A novel GnRH antagonist, causes minimal histamine release compared with abarelix in an ex vivo model of human skin samples. Br J Clin Pharmacol. 2010 Oct;70(4):580-7.

Solubility Data

Solubility (In Vitro)

DMSO: ≥ 100 mg/mL (67.75 mM) H2O: 25 mg/mL (16.94 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (1.69 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.5 mg/mL (1.69 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. 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. Solubility in Formulation 3: ≥ 2.5 mg/mL (1.69 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	0.6775 mL	3.3873 mL	6.7745 mL
	5 mM	0.1355 mL	0.6775 mL	1.3549 mL
	10 mM	0.0677 mL	0.3387 mL	0.6775 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.