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(Rac)-RP-6306

Alias: RP-6306; (Rac)-RP-6306; 2719793-90-3; lunresertib; 2719749-28-5; (R)-RP-6306; CHEMBL5199076; N95U3A7N57;
Cat No.:V42006 Purity: ≥98%
(Rac)-RP-6306 (compound 181) is a potent Myt1 inhibitor (antagonist) with IC50 of <10 nM.
(Rac)-RP-6306
(Rac)-RP-6306 Chemical Structure CAS No.: 2719749-28-5
Product category: New2
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
1mg
5mg
10mg
Other Sizes

Other Forms of (Rac)-RP-6306:

  • Lunresertib (RP-6306)
  • (R)-RP-6306
Official Supplier of:
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Top Publications Citing lnvivochem Products
Product Description
(Rac)-RP-6306 (compound 181) is a potent Myt1 inhibitor (antagonist) with IC50 of <10 nM. (Rac)-RP-6306 (compound 181) has anti-cancer effects.
Biological Activity I Assay Protocols (From Reference)
Targets
PKMYT1
ln Vitro
- PKMYT1 Inhibition: (Rac)-RP-6306 (compound 181) demonstrated inhibitory activity against PKMYT1 kinase in biochemical assays, but specific IC₅₀/Ki values were not reported in the patent [1]
- Antiproliferative Activity: The compound showed dose-dependent growth inhibition in cancer cell lines with CCNE1 amplification, but detailed GI₅₀ values and cell line-specific data were not provided [1]
ln Vivo
- Tumor Growth Inhibition: Oral administration of (Rac)-RP-6306 reduced tumor growth in xenograft models of CCNE1-amplified cancers, but specific dose-response data and tumor volume reduction percentages were not disclosed [1]
Enzyme Assay
- PKMYT1 Kinase Activity Assay: Recombinant PKMYT1 was incubated with ATP and a peptide substrate in the presence of (Rac)-RP-6306. Phosphorylation was detected using radiometric or fluorescent methods, but experimental details (e.g., concentrations, incubation time) were not described [1]
Cell Assay
- Proliferation Assay: Cancer cells were treated with (Rac)-RP-6306 for 72 hours, and viability was assessed by MTT or crystal violet staining. However, specific cell lines, concentrations, and statistical analyses were not provided [1]
Animal Protocol
- Xenograft Model: Nude mice bearing CCNE1-amplified tumor xenografts received (Rac)-RP-6306 via oral gavage. Drug formulation (e.g., suspension in 0.5% methylcellulose) and dosing frequency (e.g., daily) were mentioned, but exact doses and tumor measurement intervals were not detailed [1]
ADME/Pharmacokinetics
- Oral Bioavailability: (Rac)-RP-6306 exhibited moderate oral bioavailability in preclinical species, but specific values (e.g., F%) and pharmacokinetic parameters (e.g., Cmax, t1/2) were not reported [1]
References

[1]. Methods of using myt1 inhibitors. WO2021195782A1.

Additional Infomation
- Mechanism of Action: (Rac)-RP-6306 inhibits PKMYT1, disrupting CDK1 activation and inducing mitotic catastrophe in CCNE1-amplified cancer cells [1]
- Synthetic Lethality: The compound targets the synthetic lethal interaction between CCNE1 amplification and PKMYT1 dependency, offering a therapeutic strategy for CCNE1-driven tumors [1]
- Clinical Potential: (Rac)-RP-6306 is being evaluated in preclinical models for ovarian, endometrial, and bladder cancers with CCNE1 amplification [1]
Lunresertib is an orally bioavailable inhibitor of the human membrane-associated tyrosine- and threonine-specific cdc2-inhibitory kinase (PKMYT1), with potential antineoplastic activity. Upon oral administration, lunresertib targets, binds to and inhibits the activity of PKMYT1. This results in the inhibition of CDK1 phosphorylation, which may promote both premature mitosis and a prolonged mitotic arrest, and lead to the accumulation of unrepaired DNA damage and apoptosis in susceptible tumor cells, such as CCNE1-overexpressing tumor cells. PKMYT1 phosphorylates CDK1 specifically when CDK1 is complexed to cyclins, which blocks progression from G2 into mitosis.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C18H20N4O2
Molecular Weight
324.377003669739
Exact Mass
324.158
Elemental Analysis
C, 66.65; H, 6.21; N, 17.27; O, 9.86
CAS #
2719749-28-5
Related CAS #
RP-6306;2719793-90-3;(R)-RP-6306;2719793-91-4
PubChem CID
156869388
Appearance
Off-white to yellow solid powder
LogP
3.1
Hydrogen Bond Donor Count
3
Hydrogen Bond Acceptor Count
4
Rotatable Bond Count
2
Heavy Atom Count
24
Complexity
488
Defined Atom Stereocenter Count
0
SMILES
OC1=CC=C(C)C(=C1C)N1C(=C(C(N)=O)C2=CC(C)=C(C)N=C12)N
InChi Key
ARBRHWRTXPWZGN-UHFFFAOYSA-N
InChi Code
InChI=1S/C18H20N4O2/c1-8-5-6-13(23)10(3)15(8)22-16(19)14(17(20)24)12-7-9(2)11(4)21-18(12)22/h5-7,23H,19H2,1-4H3,(H2,20,24)
Chemical Name
2-amino-1-(3-hydroxy-2,6-dimethylphenyl)-5,6-dimethylpyrrolo[2,3-b]pyridine-3-carboxamide
Synonyms
RP-6306; (Rac)-RP-6306; 2719793-90-3; lunresertib; 2719749-28-5; (R)-RP-6306; CHEMBL5199076; N95U3A7N57;
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)
Solubility Data
Solubility (In Vitro)
DMSO : ~260 mg/mL (~801.53 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 1 mg/mL (3.08 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 (3.08 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.

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Solubility in Formulation 3: ≥ 1 mg/mL (3.08 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 3.0828 mL 15.4140 mL 30.8280 mL
5 mM 0.6166 mL 3.0828 mL 6.1656 mL
10 mM 0.3083 mL 1.5414 mL 3.0828 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.

Calculator

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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
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  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

Clinical Trial Information
RP-6306 in Patients With Advanced Cancer
CTID: NCT05605509
Phase: Phase 2
Status: Active, not recruiting
Date: 2025-07-14
Study of RP-6306 With Gemcitabine in Advanced Solid Tumors
CTID: NCT05147272
Phase: Phase 1
Status: Terminated
Date: 2025-06-17
Study of RP-6306 With FOLFIRI in Advanced Solid Tumors
CTID: NCT05147350
Phase: Phase 1
Status: Terminated
Date: 2025-06-17
Study of RP-6306 Alone or in Combination with RP-3500 or Debio 0123 in Patients with Advanced Solid Tumors
CTID: NCT04855656
Phase: Phase 1
Status: Recruiting
Date: 2025-01-20
Liquid-biopsy Informed Platform Trial to Evaluate CDK4/6-inhibitor Resistant ER+/HER2- Metastatic Breast Cancer
CTID: NCT05601440
Phase: Phase 2
Status: Recruiting
Date: 2025-01-14
Phase 1 Study of the Safety, Pharmacokinetics, Pharmacodynamics and Preliminary Clinical Activity of RP-6306 Alone or in Combination with RP-3500 in Patients with Advanced Solid Tumors
EudraCT: 2021-001637-39
Phase: Phase 1
Status: Trial now transitioned
Date: 2021-06-02
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