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Erlotinib; 4-[(3-ethynylphenyl)amino]-6,7-bis(2-methoxyethoxy)quinazoline; CAS No.: 183321-74-6;ChemShuttle specializes in providing building blocks for drug discovery, including 4-[(3-ethynylphenyl)amino]-6,7-bis(2-methoxyethoxy)quinazoline. As a custom synthesis company, it offers Small molecules synthesis services to support the development of new pharmaceuticals. This compound, with its specific substituents, serves as a key intermediate in the synthesis of certain medications. The company's online presence and its role as a worldwide chemical supplier ensure that researchers can access such valuable chemical intermediates.