| abstract |
The present invention relates to a novel carbamic acid ester of formula (1).n n n Formula 1n n n n n n n n In Chemical Formula 1,n n n X - and groups A, R 1 , R 2 , R 3 and R 4 are as defined in the claims and specification.n n n The invention also relates to a process for the preparation of the esters and to their use as medicaments, in particular medicaments with anticholinergic action. |