17,17-(Ethylenedioxy)androst-4-en-3-one (4-androstene-3,17-dione-17-cyclic ethylene ketal) is an active ingredient in cosmetics and may be utilized in research on acne and promoting hair growth. 17,17-(Ethylenedioxy)androst-4-en-3-one inhibits reductase activity and inhibits/disrupts the binding of receptor proteins to 5α-DHT.

Physicochemical Properties

Molecular Formula	C21H30O3
Molecular Weight	330.46
Exact Mass	330.219
CAS #	1044-89-9
PubChem CID	14974601
Appearance	White to light yellow solid powder
LogP	4.261
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Heavy Atom Count	24
Complexity	602
Defined Atom Stereocenter Count	5
SMILES	O1C([H])([H])C([H])([H])OC21C([H])([H])C([H])([H])[C@]1([H])[C@]3([H])C([H])([H])C([H])([H])C4=C([H])C(C([H])([H])C([H])([H])[C@]4(C([H])([H])[H])[C@]3([H])C([H])([H])C([H])([H])[C@@]12C([H])([H])[H])=O
InChi Key	KFDWIKRQOPJCDM-DEPCRRQNSA-N
InChi Code	InChI=1S/C21H30O3/c1-19-8-5-15(22)13-14(19)3-4-16-17(19)6-9-20(2)18(16)7-10-21(20)23-11-12-24-21/h13,16-18H,3-12H2,1-2H3/t16-,17+,18+,19+,20+/m1/s1
Chemical Name	(8'R,9'S,10'R,13'S,14'S)-10',13'-dimethylspiro[1,3-dioxolane-2,17'-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene]-3'-one
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

References

[1]. Atsushi Kino, et al. Cosmetic. JP60136505A.

Solubility Data

Solubility (In Vitro)

DMSO: 10 mg/mL (30.26 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 1 mg/mL (3.03 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 10.0 mg/mL clear DMSO stock solution to 400 μL of PEG300 and mix evenly; then add 50 μL of Tween-80 to the above solution and mix evenly; then add 450 μL of 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: ≥ 1 mg/mL (3.03 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 10.0 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: ≥ 1 mg/mL (3.03 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 10.0 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	3.0261 mL	15.1304 mL	30.2608 mL
	5 mM	0.6052 mL	3.0261 mL	6.0522 mL
	10 mM	0.3026 mL	1.5130 mL	3.0261 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.