The present invention relates to a compound which is represented by the following general formula and has type 4 phosphodiesterase inhibitory action, and uses and an intermediate compound thereof. ##STR00001## (wherein R1, R2: hydrogen, a halogen, a lower alkyl, a lower alkoxy, or the like, R3, R4: hydrogen, a (substituted) lower alkyl, a halogen, or the like, R5: hydrogen, a lower alkyl, a lower alkoxycarbonyl, or the like, and n: 0 or 1).