Compounds of a certain formula 1,
in which R1, R2, R3, R31, R4, R5, R51, R6 and R7 have the meanings indicated in the description, are novel effective PDE4 inhibitors.
Compounds of a certain formula (I)
in which R1, R2, R3, R31, R4, R5, R51, R6 and R7 have the meanings indicated in the description, are novel effective PDE4 inhibitors.
Compounds of a certain formula (1), in which R1, R2, R3, R31, R4, R5, R51, R6 and R7 have the meanings indicated in the description, are novel effective PDE4 inhibitors.