RM-018 is a novel tricomplex KRASG12C active-state inhibitor that has different functional properties. RM-018 is still capable of binding to and inhibiting KRASG12C/Y96D, and it may be able to get past resistance. Particularly, RM-018 binds to KRASG12C in its GTP-bound, active [“RAS(ON)”] state[1].

Physicochemical Properties

Molecular Weight	985.22
Exact Mass	984.55
Elemental Analysis	C, 68.27; H, 7.37; N, 11.37; O, 12.99
CAS #	2641993-55-5
Related CAS #	2641993-55-5
PubChem CID	161776064
Appearance	Off-white to light yellow solid powder
LogP	5.8
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	11
Rotatable Bond Count	10
Heavy Atom Count	72
Complexity	1970
Defined Atom Stereocenter Count	5
SMILES	CCN1C2=C3C=C(C=C2)C4=CC=CC(=C4)C[C@@H](C(=O)N5CCC[C@H](N5)C(=O)OCC(CC3=C1C6=C(N=CC=C6)[C@H](C)OC)(C)C)NC(=O)[C@H](C(C)C)N(C)C(=O)[C@H]7CCN(C7)C(=O)C#CCN8CCOCC8
InChi Key	KXMPBNBAZLJBDS-GUZCBZAASA-N
InChi Code	InChI=1S/C56H72N8O8/c1-9-63-47-20-19-40-32-43(47)44(51(63)42-16-11-22-57-49(42)37(4)70-8)33-56(5,6)35-72-55(69)45-17-12-24-64(59-45)54(68)46(31-38-14-10-15-39(40)30-38)58-52(66)50(36(2)3)60(7)53(67)41-21-25-62(34-41)48(65)18-13-23-61-26-28-71-29-27-61/h10-11,14-16,19-20,22,30,32,36-37,41,45-46,50,59H,9,12,17,21,23-29,31,33-35H2,1-8H3,(H,58,66)/t37-,41-,45-,46-,50-/m0/s1
Chemical Name	(3S)-N-[(2S)-1-[[(8S,14S)-22-ethyl-21-[2-[(1S)-1-methoxyethyl]pyridin-3-yl]-18,18-dimethyl-9,15-dioxo-16-oxa-10,22,28-triazapentacyclo[18.5.2.12,6.110,14.023,27]nonacosa-1(26),2,4,6(29),20,23(27),24-heptaen-8-yl]amino]-3-methyl-1-oxobutan-2-yl]-N-methyl-1-(4-morpholin-4-ylbut-2-ynoyl)pyrrolidine-3-carboxamide
Synonyms	RM-018; RM 018; RM018
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

Targets	KRAS (G12C); KRAS (G12C/Y96D)
ln Vitro	Utilizing the widely distributed ligand protein cyclophilin A, RM-018 is a "tricomplex" KRAS conjugate that binds to and inhibits KRASG12C[1]. The IC50 values of RM-018 (0.01-1000 nM; 72 h) against NCI-H358, MIA PaCa-2, Ba/F3, and MGH1138-1 cells are 1.4-3.5 nM (KRASG12C) and 2.8-7.3 nM (KRASG12C/Y96D), respectively. )[1]. RM-018 (0–100 nM; 4)
Cell Assay	cell viability assay [1] Cell Types: NCI-H358, MIA PaCa-2, Ba/F3 and MGH1138-1 cells stably infected with KRASG12C or KRASG12C. h) Inhibits KRAS, pERK, Expression of pRSK expression[1]. /Y96D. Tested Concentrations: 0.01-1000 nM Incubation Duration: 72 hrs (hours) Experimental Results: Inhibited cell viability but largely unaffected by KRASG12C/Y96D expression. Western Blot Analysis [1] Cell Types: MIA PaCa-2, HEK293T and MGH1138-1 cells, expressing KRASG12C or KRASG12C/Y96D. Tested Concentrations: 0-100 nM Incubation Duration: 4 hrs (hours) Experimental Results: Inhibited KRAS, pERK and pRSK levels with similar potency.
References	[1]. Tanaka N, et.al. Clinical Acquired Resistance to KRASG12C Inhibition through a Novel KRAS Switch-II Pocket Mutation and Polyclonal Alterations Converging on RAS-MAPK Reactivation. Cancer Discov. 2021 Aug;11(8):1913-1922.

Solubility Data

Solubility (In Vitro)

DMSO: ~60 mg/mL (60.9 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	1.0150 mL	5.0750 mL	10.1500 mL
	5 mM	0.2030 mL	1.0150 mL	2.0300 mL
	10 mM	0.1015 mL	0.5075 mL	1.0150 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.