Thrombopoetin receptor activator and process for producing the same
Patent 7851503 Issued on December 14, 2010. Estimated Expiration Date: 
August 14, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 14, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of inhibiting tumor growth using xanthocillin X dimethylether Patent #: 5312833 InventorsAssigneeApplicationNo. 10524666 filed on 08/14/2003US Classes:514/525Two or more of the cyano groupsExaminersPrimary: Wilson, James O.Assistant: Sackey, Ebenezer Attorney, Agent or FirmForeign Patent References
International ClassA61K 31/275AbstractA preventive, therapeutic or improving agent for diseases against which activation of the thrombopoietin receptor is effective or a platelet increasing agent, which contains a thrombopoietin receptor activator represented by the formula (1):[wherein each of R1 and R3 is independently a hydrogen atom, SO3H, a C1-6 alkyl group, a C1-6 alkylcarbonyl group or a C6-18 arylcarbonyl group (the C1-6 alkyl group, the C1-6 alkylcarbonyl group and the C6-18 arylcarbonyl group may be optionally substituted with a halogen atom, a hydroxyl group, a C2-6 alkenyl group, a C1-6 alkoxy group, a C1-6 alkoxycarbonyl group, a C6-18 aryl group, a 2-pyridyl group, a 3-pyridyl group, a 4-pyridyl group, a 2-furanyl group, a 3-furanyl group, a 2-thienyl group, a 3-thienyl group or NR9R10) , and each of R2, R4 and Ra is independently a hydrogen atom, a hydroxyl group or a C1-6 alkoxy group]. Other References
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