CP-10 (CP10; CP 10), designed from a focused PROTAC library hijacking cancer therapeutic target CDK6, is a novel and potent PROTAC-based protein degrader targeting CDK6 with high selectivity, specificity, and remarkable CDK6 degradation efficiency (DC50=2.1 nM). It inhibits proliferation of several haematopoietic cancer cells with impressive potency including multiple myeloma, and can still degrades mutated and overexpressed CDK6. A design principle as 'match/mismatch' was proposed for understanding the degradation profile differences in these PROTACs. Notably, potent PROTACs with specific and remarkable CDK6 degradation potential were generated by linking CDK6 inhibitor palbociclib and E3 ligase CRBN recruiter pomalidomide. The PROTAC strongly inhibited proliferation of hematopoietic cancer cells including multiple myeloma and robustly degraded copy-amplified/mutated forms of CDK6, indicating future potential clinical applications.

Physicochemical Properties

Molecular Formula	C10H13CL9
Molecular Weight	452.2872
Exact Mass	871.387
CAS #	2366268-80-4
PubChem CID	138911323
Appearance	Light yellow to yellow solid powder
LogP	1.8
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	16
Rotatable Bond Count	15
Heavy Atom Count	64
Complexity	1810
Defined Atom Stereocenter Count	0
SMILES	ClC([H])(C([H])(C([H])(C([H])(C([H])([H])Cl)Cl)Cl)Cl)C([H])(C([H])(C([H])(C([H])(C([H])([H])[H])Cl)Cl)Cl)Cl
InChi Key	PACRWHUPEPCFHX-UHFFFAOYSA-N
InChi Code	InChI=1S/C44H49N13O7/c1-26-32-23-47-44(50-39(32)56(29-6-3-4-7-29)42(62)37(26)27(2)58)48-35-12-10-30(22-46-35)54-17-15-53(16-18-54)24-28-25-55(52-51-28)19-21-64-20-14-45-33-9-5-8-31-38(33)43(63)57(41(31)61)34-11-13-36(59)49-40(34)60/h5,8-10,12,22-23,25,29,34,45H,3-4,6-7,11,13-21,24H2,1-2H3,(H,49,59,60)(H,46,47,48,50)
Chemical Name	4-[2-[2-[4-[[4-[6-[(6-acetyl-8-cyclopentyl-5-methyl-7-oxopyrido[2,3-d]pyrimidin-2-yl)amino]pyridin-3-yl]piperazin-1-yl]methyl]triazol-1-yl]ethoxy]ethylamino]-2-(2,6-dioxopiperidin-3-yl)isoindole-1,3-dione
Synonyms	CP-10; CP 10; CP10
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 (e.g. under nitrogen), 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

ln Vitro	CP-10 caused approximately 72% degradation of CDK6 at 10 nM and 89% degradation at 100 nM in human astroblastoma U251 cells. Compared to CDK6 (DC50), CDK4 is substantially less susceptible to CP-10's degradation. In both mantle cell thoracic cells (in Mino, IC50≈8 nM) and multiple myeloma cells MM.1S (IC50≈10 nM), CP-10 decreases cell viability [1]: 50–80 times][1].
References	[1]. Potent and Preferential Degradation of CDK6 via Proteolysis Targeting Chimera Degraders. J Med Chem. 2019 Aug 2.

Solubility Data

Solubility (In Vitro)

DMSO : ~200 mg/mL (~229.37 mM)

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	2.2110 mL	11.0549 mL	22.1097 mL
	5 mM	0.4422 mL	2.2110 mL	4.4219 mL
	10 mM	0.2211 mL	1.1055 mL	2.2110 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.