Para ethyl amino phenol pharmaceutical compounds

A compound of formula I, ##STR18## in which R.sub.1 represents CH.sub.2 R.sub.12, or fluorine;

• R.sub.2 and R.sub.3, which may be the same or different, each independently represent hydrogen, fluorine, chlorine, bromine, alkyl C.sub.1 to C.sub.6, nitro, nitrile, (CH.sub.2).sub.p R.sub.9 or SR.sub.9 ;
• R.sub.12 represents hydrogen, OH, SO.sub.2 R.sub.13 or alkyl C.sub.1 to C.sub.6,
• R.sub.13 represents alkyl C.sub.1 to C.sub.6,
• W represents a single bond, a 1,2;
• 1,3;
• or 1,4-disubstituted benzene ring;
• a --CH.dbd.CH-- group or a 1,4-cyclohexanediyl group;
• X represents NH, O, S, SO.sub.2, CO, CH.sub.2, CONH or --COO;
• Y represents (CH.sub.2).sub.q, CO, CS, SO.sub.2 and R.sub.20 represents hydrogen, or Y represents CR.sub.15 R.sub.16 CR.sub.17 R.sub.18, wherein the carbon atom bearing R.sub.15 and R.sub.16 is adjacent to X and in which
• R.sub.17 and R.sub.18, together with the carbon atom to which they are attached from a carbonyl group, and R.sub.15, R.sub.16, R.sub.17 and R.sub.18 each represent hydrogen, or
• R.sub.15, R.sub.16, R.sub.17 and R.sub.18 each independently represent hydrogen or alkyl C.sub.1 to C.sub.6 and R.sub.20 represents hydrogen;
• Z represents a single bond, NR.sub.19, CH.sub.2, O, CO, S or SO.sub.2,
• in which R.sub.19 represents hydrogen or alkyl C.sub.1 to C.sub.6 ;
• n, and m each independently represent an integer from 1 to 4 inclusive;
• q represents an integer from 1 to 3 inclusive;
• p represents 0 or an integer from 1 to 3 inclusive;
• R.sub.9 represents phenyl or phenyl substituted by hydroxy, and
• R.sub.10 represents hydrogen or chlorine,
• provided that
• (i) when X represents SO.sub.2, CO, COO or CONH, Y does not represent CO, CS or SO.sub.2 ;
• (ii) when Y represents CO, CS or SO.sub.2, then Z does not represent CO or SO.sub.2,
• and pharmaceutically acceptable derivatives thereof.