PCT No. PCT/EP92/02067 Sec. 371 Date Jul. 5, 1994 Sec. 102(e) Date Jul. 5, 1994 PCT Filed Sep. 3, 1992 PCT Pub. No. WO93/06098 PCT Pub. Date Apr. 1, 1993 IMAGE (I) IMAGE (Ya) IMAGE (Yb) Compounds of formula (I) wherein X is either (a) a phenyl group optionally substituted by 1 or 2 substituents each independently selected from halo, CF3, C1-C4 alkyl, C1-C4 alkoxy and hydroxy or (b) a thienyl group; and Y is of formula (Ya) or (Yb) where A and B are 0, 1 or 2, D and E are 0 or 1, F is 0-3 and D+E+F=1-3, Z is 0, 1 or 2, R1 and R2 are H or alkyl or form a ring, and R3 is C1-C4 alkyl, C3-C6 cycloalkyl or optionally substituted phenyl or benzyl, are antimuscarinic bronchodilators useful for treating chronic obstructive airways disease or asthma.
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