Osimertinib mesylateProduct ingredient for Osimertinib

Name
Osimertinib mesylate
Drug Entry
Osimertinib

Osimertinib is an oral, third-generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI) drug developed by AstraZeneca Pharmaceuticals. Its use is indicated for the treatment of metastatic non-small cell lung cancer (NSCLC) in cases where tumour EGFR expression is positive for the T790M mutation as detected by FDA-approved testing and which has progressed following therapy with a first-generation EGFR tyrosine kinase inhibitor. Approximately 10% of patients with NSCLC have a rapid and clinically effective response to EGFR-TKIs due to the presence of specific activating EGFR mutations within the tumour cells. More specifically, deletions around the LREA motif in exon 19 and exon 21 L858R point mutations are correlated with response to therapy.

Development of third-generation EGFR-TKIs, such as osimertinib, has been in response to altered tumour resistance patterns following treatment and toxic side effects that impact patient quality of life. Treatment with first-generation EGFR-TKIs (gefitinib and erlotinib) has been associated with the development of resistance through activating mutations in the EGFR gene. Second-generation EGFR-TKIs (afatinib and dacomitinib) were then developed to be more potent inhibitors, although their use is associated with increased toxicity through nonspecific targeting of wild-type EGFR. In contrast, third-generation inhibitors are specific for the gate-keeper T790M mutations which increases ATP binding activity to EGFR and result in poor prognosis for late-stage disease. Furthermore, osimertinib has been shown to spare wild-type EGFR during therapy, thereby reducing non-specific binding and limiting toxicity.

Accession Number
DBSALT001606
Structure
Thumb
Synonyms
Not Available
UNII
RDL94R2A16
CAS Number
1421373-66-1
Weight
Average: 595.72
Monoisotopic: 595.257688493
Chemical Formula
C29H37N7O5S
InChI Key
FUKSNUHSJBTCFJ-UHFFFAOYSA-N
InChI
InChI=1S/C28H33N7O2.CH4O3S/c1-7-27(36)30-22-16-23(26(37-6)17-25(22)34(4)15-14-33(2)3)32-28-29-13-12-21(31-28)20-18-35(5)24-11-9-8-10-19(20)24;1-5(2,3)4/h7-13,16-18H,1,14-15H2,2-6H3,(H,30,36)(H,29,31,32);1H3,(H,2,3,4)
IUPAC Name
N-(2-{[2-(dimethylamino)ethyl](methyl)amino}-4-methoxy-5-{[4-(1-methyl-1H-indol-3-yl)pyrimidin-2-yl]amino}phenyl)prop-2-enamide; methanesulfonic acid
SMILES
CS(O)(=O)=O.COC1=CC(N(C)CCN(C)C)=C(NC(=O)C=C)C=C1NC1=NC(=CC=N1)C1=CN(C)C2=CC=CC=C12
External Links
ChemSpider
32743638
ChEBI
90948
ChEMBL
CHEMBL3545063
Wikipedia
Osimertinib
Predicted Properties
PropertyValueSource
Water Solubility0.0224 mg/mLALOGPS
logP4.47ALOGPS
logP4.49ChemAxon
logS-4.4ALOGPS
pKa (Strongest Acidic)13.64ChemAxon
pKa (Strongest Basic)8.87ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count7ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area87.55 Å2ChemAxon
Rotatable Bond Count10ChemAxon
Refractivity150.32 m3·mol-1ChemAxon
Polarizability54.58 Å3ChemAxon
Number of Rings4ChemAxon
Bioavailability1ChemAxon
Rule of FiveNoChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleYesChemAxon