Abstract:
            This invention concerns the treatment of smooth muscle spasticity or excess muscle contraction such as urge urinary incontinence with a compound of the formula wherein: R and R are independently straight chain alkyl of 1 to 6 carbon atoms, branched alkyl of 3 to 6 carbons atoms, or cycloalkyl of 3 to 6 carbons atoms where R may be substituted by F, Cl, Br, I, OH, NH , cyano, C -C alkoxy, C -C alkylthio, COOH or COOC -C alkyl; R is an aryl or heteroaryl as defined herein, optionally substituted with 0 to 4 groups selected independently from C -C alkyl, C -C alkoxy, cyano, F, Cl, Br, C -C alkylthio, CO R , CONH , OH, NH , and NO ; n is 0 or 1; R is a straight chain alkyl group of 1 to 10 carbons atoms, a branched alkyl of 3 to 10 carbons, or a cycloalkyl of 3 to 10 carbons; and all crystalline forms and the pharmaceutically acceptable salts thereof.