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Lapatinib IMpurity 1 Lapatinib Impurity 35 Lapatinib Impurity 20 O-De(3-fluorobenzyl) Lapatinib Lapatinib O-Desfluorobenzyl Imp Lapatinib O-Desfluorobenzyl Impurity LapatinibImpurity1Lapatinib)DitosylateSalt Lapatinib Impurity 1 (O-De(3-fluorobenzyl) Lapatinib) Lapatinib Impurity 1 (O-De(3-fluorobenzyl) Lapatinib) Ditosylate Salt 2-chloro-4-((6-(5-(((2-(methylsulfonyl)ethyl)amino)methyl)furan-2-yl)quinazolin-4-yl)amino)phenol Phenol, 2-chloro-4-[[6-[5-[[[2-(methylsulfonyl)ethyl]amino]methyl]-2-furanyl]-4-quinazolinyl]amino]- O-De(3-fluorobenzyl) Lapatinib Ditosylate SaltQ: What is O-De(3-fluorobenzyl) Lapatinib Ditosylate Salt Q: What is the CAS Number of O-De(3-fluorobenzyl) Lapatinib Ditosylate Salt