NOVEL HETEROCYCLIC COMPOUNDS

摘要

A compound of formula (I): or a pharmaceutically acceptable acid addition salt and/or a pharmaceutically acceptable solvate thereof. wherein R<1> and R<2> each independently represents a hydrogen or halogen atom, a C1-6 alkyl or C1-6 alkoxy group; R<3> and R<4> each independently represents a hydrogen atom or a C1-6 alkyl group; X represents a bond or a moiety CHR<5> wherein R<6> is a group R<3>; and Z represents O or NH; a process for preparing such compounds, a pharmaceutical composition containing such compounds, and the use of such compounds and compositions in medicine.