[{"from": "human", "value": "Provide a brief overview of this molecule. [C][#C][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][N][C][=N][C][=N][C][=C][C][=C][Branch1][#Branch1][C][=C][Ring1][=Branch1][Ring1][#Branch2][O][C][C][O][C][C][O][C][C][O][Ring1][=C].[Cl]"}, {"from": "gpt", "value": "The molecule is the hydrochloride salt form of icotinib, an orally available quinazoline-based inhibitor of epidermal growth factor receptor (EGFR), with potential antineoplastic activity. Icotinib selectively inhibits the wild-type and several mutated forms of EGFR tyrosine kinase. This may lead to an inhibition of EGFR-mediated signal transduction and may inhibit cancer cell proliferation. EGFR, a receptor tyrosine kinase, has been upregulated in a variety of cancer cell types."}]