Lapatinib, Free Base (GSK 572016, GW-572016, GW 572016X, Tykerb, Tyverb, CAS 231277-92-2), >99%

LC Laboratories' Product Number L-4899 - Lapatinib, Free Base (GSK 572016, GW-572016, GW 572016X, Tykerb, Tyverb, CAS 231277-92-2), >99% - for research use only. This is the free base form of lapatinib; please see our product Lapatinib, Di-p-Toluenesulfonate Salt, Cat. No. L-4804, for further technical information. The di-p-toluenesulfonate salt form of lapatinib, not the free base, is used in the lapatinib formulation for use in humans. Lapatinib (as the di-p-toluenesulfonate salt) is the active ingredient in the drug sold under the trade names Tykerb® in the US and Tyverb® in Europe. This drug has been approved in at least one country to treat advanced metastatic breast cancer in conjunction with the chemotherapy drug Xeloda (generic name, capecitabine, Cat. No. C-2799). The CAS number for Lapatinib, Free Base is 231277-92-2. The CAS number of the di-p-toluenesulfonate salt (Cat. No. L-4804) is 388082-77-7.

• Supplier: LC Laboratories
• Product #: L-4899
• Sku #: L-4899_10g