abstract |
Racemic or optically active compound of formula (I), wherein X is O or NH, R?1 is a (C7?-C11?)polycycloalkyl group, R?2 is methyl or ethyl, Y is (II) or (III), R?3 is hydrogen, (C1?-C3?)alkyl, (C2?-C3?)alkenyl, benzyl or phenethyl, and R?4 is hydrogen, (C1?-C3?)alkyl or (C2?-C3?)alkanoyl, are useful in the treatment of asthma or inflammatory airway or skin diseases. |