#$%^&*AU2013234404A120131017.pdf#####- 67 Abstract The compounds of a certain formula 1, in which R1, R7, R8, R9 and n have the meanings as given in 5 the description, are novel effective inhibitors of the type 4 phosphodiesterase. (C2 R9 N N-N (1) R1 -- O R7 R8