| abstract |
(57) [Problem] To provide a compound having a phosphodiesterase IV harmful effect. SOLUTION: Formula (I) [In the formula, R 1 represents a C 1 -C 8 alkyl group, R 2 is C 1 A C 4 alkyl group, R 3 is H, an aryl group and the like, and R 4 is an aryl group; general formula (II) (Wherein, R 5, R 6 is H, a C 1 -C 6 alkyl group, R 7 Represents a C 1 -C 6 alkyl group, etc.) and the like. A 2-phenylmorpholine derivative represented by the formula: |