MRTX1133 formic is a noncovalent, potent, and selective KRAS G12D inhibitor. MRTX1133 formic optimally fills the switch II pocket and extends three substituents to favorably interact with the protein, resulting in an estimated K_D against KRAS G12D of 0.2 pM. MRTX1133 formic prevents SOS1-catalyzed nucleotide exchange and/or formation of the KRASG12D/GTP/RAF1 complex, thereby inhibiting mutant KRAS-dependent signal transduction. MRTX1133 formic has picomolar binding affinity, single digit nanomolar activity in cellular assays, and marked in vivo efficacy in tumor models harboring KRAS G12D mutations^[1][2].

MRTX1133 formic inhibits ERK phosphorylation in the AGS cell line with an IC₅₀ ranging 1-10 nM (AsPC-1, Panc 04.03, Panc 02.03, SW1990, GP2D, Suit2, A427, SNU1033, and HPAC cells). In a 2D viability assay, the IC₅₀ of MRTX1133 formic is 6 nM against AGS cells (KRAS G12D), while demonstrating more than 500-fold selectivity against MKN1, a cell line which is dependent on KRAS for its growth and survival due to the amplification of wild-type KRAS^[1].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

MRTX1133 demonstrates dose-dependent inhibition of the KRAS pathway tumor regression in G12D mutant tumor models^[2].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

646.66

C₃₄H₃₃F₃N₆O₄

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

DMSO : 50 mg/mL (77.32 mM; Need ultrasonic)

H₂O : 25 mg/mL (38.66 mM; ultrasonic and warming and heat to 60°C)

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)。-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

• 1.

  请依序添加每种溶剂： 10% DMSO    40% PEG300    5% Tween-80    45% saline

  Solubility: ≥ 2.08 mg/mL (3.22 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (3.22 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。

  将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液

• 2.

  请依序添加每种溶剂： 10% DMSO    90% (20% SBE-β-CD in saline)

  Solubility: ≥ 2.08 mg/mL (3.22 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (3.22 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中，混合均匀。

  将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明

• [1]. Wang X, et al. Identification of MRTX1133, a Noncovalent, Potent, and Selective KRASG12D Inhibitor [published online ahead of print, 2021 Dec 10]. J Med Chem. 2021;10.1021/acs.jmedchem.1c01688.

  [2]. KRAS G12D Inhibitor: MRTX1133. [(accessed on 22 April 2021)];2021 Available online.