Organic compounds and their use as pharmaceuticals

A compound of the formula ##STR12## in which R.sup.1 and R.sup.2 independently are hydrogen, halo, nitro, amino, C.sub.2-5 acylamino, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, C.sub.1-4 alkylthio, C.sub.1-4 alkylsulphonyl, imidazolyl attached through a nitrogen atom, pyrazolyl attached through a nitrogen atom, attached through a nitrogen atom, phenyl, phenylthio, phenylsulphonyl or phenylsulphonamido, or phenyl, phenylthio, phenylsulphonyl or phenylsulfonamido substituted with one to three halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, hydroxy, nitro, cyano, amino, carboxy or carboxamido groups, or R.sup.1 and R.sup.2 together form a C.sub.3-5 alkylene bridge, R.sup.3 is C.sub.1-4 alkyl or C.sub.2-4 alkenyl, and X is (i) --(CH.sub.2).sub.n N(R.sup.4).sub.2 where each R.sup.4 independently is C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.6 H.sub.5 CH.sub.2 --, or C.sub.6 H.sub.5 CH.sub.2 -- substituted with one to three halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, hydroxy, nitro, cyano, amino, carboxy or carboxamido groups, and n is 1, 2 or 3, or (ii) an alicyclic group which is ##STR13## m is 1, 2 or 3 and R.sup.5 is C.sub.1-4 alkyl, C.sub.2-4 alkenyl, benzyl or benzyl substituted with one to three halogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, hydroxy, nitro, cyano, amino, carboxy or carboxamido groups;

• and salts thereof.