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An inhibitor of ErbB2 (HER2)
Catalog #: B3025
SKU-Size Size Price Qty
B3025-5 5 mg
B3025-25 25 mg
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Product Details

Alternate Name Irbinitinib; ONT-380; 6-DIAMINE; ARRY-380; 6-N-(4,4-dimethyl-5H-1,3-oxazol-2-yl)-4-N-[3-methyl-4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)phenyl]quinazoline-4,6-diamine; 4,6-QuinazolinediaMine,N6-(4,5-dihydro-4,4-diMethyl-2-oxazolyl)-N4-[3-Methyl-4-([1,2,4]triazolo[1,5-a]pyridin-7-yloxy)phenyl]-; N6-(4,4-dimethyl-1,3-oxazolidin-2-ylidene)-n4-(3-methyl-4-{[1,2,4]triazolo[1,5-a]pyridin-7-yloxy}phenyl)quinazoline-4,6-diamine
Appearance White to off-white solid powder
CAS # 937263-43-9
Molecular Formula C₂₆H₂₄N₈O₂
Molecular Weight 480.52
Purity ≥97%
Solubility ~50 mg/ml in DMSO (may need ultrasonication)
InChi InChI=1S/C26H24N8O2/c1-16-10-17(5-7-22(16)36-19-8-9-34-23(12-19)28-15-30-34)31-24-20-11-18(4-6-21(20)27-14-29-24)32-25-33-26(2,3)13-35-25/h4-12,14-15H,13H2,1-3H3,(H,32,33)(H,27,29,31)
PubChem CID 51039094
MDL Number MFCD22380467
Handling Do not take internally. Wear gloves and mask when handling the product! Avoid contact by all modes of exposure.
Storage Conditions -20ºC
Shipping Conditions RT
USAGE For Research Use Only! Not For Use in Humans.


Tucatinib is an oral, potent, selective and ATP-competitive small-molecule inhibitor of Receptor tyrosine-protein kinase ErbB2 (also called HER2 or human epidermal growth factor receptor 2) with an IC₅₀ of 14 nM against ErbB2 enzyme. It inhibits the phosphorylation of ErbB2 in BT474 cells with an IC₅₀ of 21 nM. It shows excellent anti-tumor activity in numerous mouse tumor models including breast (BT-474, MDA-MB-453), ovarian (SKOV-3) and gastric (N87) carcinoma models. In the BT-474 model, it showed significant dose-related tumor growth inhibition (TGI; 50% at 50 mg/kg/d and 96% at 100 mg/kg/d). It is approved to be used in combination chemotherapy for advanced HER2-positive breast cancer.

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