Secondary amines, their preparation and use in pharmaceutical compositions

A compound of formula (II):

• ##STR19## or a pharmaceutically acceptable salt thereof, in which R.sub.1 is hydrogen, fluorine, chlorine, bromine, hydroxy, hydroxymethyl, methyl, methoxy, amino, formamido, acetamido, methylsulphonylamido, nitro, benzyloxy, methylsulphonylmethyl, uredio, trifluoromethyl or p-methoxybenzylamino;
• R.sub.2 is hydrogen, fluorine, chlorine, bromine or hydroxyl;
• R.sub.3 is hydrogen, chlorine or bromine or hydroxyl, R.sub.4 is alkyl of 1 to 10 carbon atoms substituted by hydroxyl, lower alkoxyl, oxo, lower acyloxy, carboxymethyoxy or carbo(lower alkoxy)methoxy;
• R.sub.5 is hydrogen, chlorine, fluorine, methyl, methoxy hydroxyl, or carboxy or lower alkyl ester or amide of said carboxy;
• R.sub.6 is hydrogen, methyl, ethyl or propyl;
• R.sub.7 is hydrogen, methyl, ethyl or propyl;
• X is a bond;
• and Y is alkylene of up to 6 carbon atoms or a bond.