The invention relates to compounds corresponding to formula (I):in which - R3and R4together form, with the carbon atoms of the phenyl nucleus to which they are attached, a 6-membered nitrogenous heterocycle corresponding to one of formula (A), (B) or (C) below:in which the wavy lines represent the phenyl nucleus to which R3and R4are attached.Preparation process and therapeutic use.本發明係關於式(I)化合物:其中- R3及R4與其所連接之苯基核之碳原子一起形成對應於下式(A)、(B)或(C)中之一者的6員含氮雜環:其中波形線表示R3及R4所連接之苯基核;以及其製備方法及其治療用途。