摘要 |
<p>According to the invention there are provided compounds having the general formula (I): <CHEM> and stereoisomers thereof, wherein one of X and Y, but not both, is a group of the formula (II): <CHEM> and the other of X and Y is a hydrogen atom, a halogen atom, or an alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, alkynyl, aryl, aralkyl, alkoxy, aryloxy or haloalkyl group or a <CHEM> group wherein R<9>, R<1><0> and R<1><1> can be alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl or aryl, Z is an oxygen atom, a sulphur atom or an -NH-group, A and B have the same significance as X or Y excluding a group of formula (II), R<1>, R<2>, R<3> and R<4> each represent a hydrogen atom, a halogen atom or an alkyl group containing from l to 4 carbon atoms, R<5> and R<6> each represent a hydrogen atom or an alkyl group containing from l to 4 carbon atoms, and R<7> and R<8> each represent an alkyl group containing from l to 4 carbon atoms or R<7> and R<8> together with the adjacent nitrogen atom form a heterocyclic ring which may optionally contain an additional hetero atom; and acid addition salts thereof.</p> |