The invention relates to a compound according to the following general formula (I), in which: m represents an integer equal to 5, 6 or 7; n and n.sup.1 represent an integer from 1 to 5; the A groups represent, in particular, a hydrogenated atom; X represents O or S; Y represents, in particular, a group NR.sub.1, R.sub.1, representing, in particular, a hydrogenated atom; W represents CH or N; and Z represents, in particular, a hydrogenated atom.