The compounds of a certain formula 1,
in which R1, R7, R8, R9 and n have the meanings as given in the description, are novel effective inhibitors of the type 4 phosphodiesterase.
The compounds of a certain formula 1,
in which R1, R7, R8, R9 and n have the meanings as given in the description, are novel effective inhibitors of the type 4 phosphodiesterase.