Abstract: Compound of general formula (I): ##STR1## in which: X, Y, Z and T each represent, independently of one another, a nitrogen atom, a --CH.dbd. group or a group CW, in which W represents a halogen atom or a lower alkyl or alkoxy group optionally substituted with one or more halogen atoms, such as a trifluoromethyl group, on condition that only one of them represents a nitrogen atom,Ra, Rb, Rc, Rd and Re represent, independently of one another, a hydrogen atom, a halogen atom or a lower alkyl or alkoxy group optionally substituted with one or more halogen atoms, such as a trifluoromethyl group,B represents a hydrogen atom and D a hydroxyl group, or B and D simultaneously represent an oxygen atom,n represents 1 or 2, andR.sub.