| abstract |
Compounds of formula (I), wherein A is a hydrogen atom or a hydroxyl group; B is a hydrogen atom or a C1-8 alkyl, C1-8 alkenyl, C1-8 fluoroalkyl or C1-8 perfluoroalkyl group; each of R1, R2 and R5, which are the same or different, is a hydrogen atom, a halogen such as chlorine, bromine or fluorine, a C1-8 alkyl, C1-8 alkenyl, C3-8 cycloalkyl, C3-8 cycloalkenyl, C6, C10 or C14 aryl, C1-6 alkoxycarbonyl, C1-6 hydroxyalkyl, C1-6 alkoxyalkyl, C1-6 alkoxy, C1-8 fluoroalkyl or C1-8 perfluoroalkyl group, or R1 and R2 taken together form a C3-8 cycloalkyl, C3-8 cycloalkenyl or C6, C10 or C14 aryl ring, except for compounds in which R1 and R2 are both hydrogen; each of R3 and R4, which are the same or different, is a hydrogen atom or a C1-8 alkyl, C1-8 alkenyl, C3-8 cycloalkyl or C3-8 cycloalkenyl group, or R3 and R4 taken together form a C2-6 cycloalkyl or C3-6 cycloalkenyl ring, e.g. piperidyl, azetidinyl or pyrrolidyl; in the form of enantiomers, diastereoisomers or mixtures thereof, including racemic mixtures, as well as pharmaceutically acceptable acid addition salts thereof, are disclosed. The compounds may be used in therapy. |