Agent: Townsend And Townsend And Crew, LLP20100160392 - Histone deacetylase inhibitors: The present invention provides histone deacetylase inhibitors of general formula (I), a process for the preparation of such compounds and uses of the compounds in medicine, especially in the treatment of cancers: in which R1 is an optionally substituted aryl, arylalkyl, heteroaryl, heterocycloalkenyl, cycloalke