Compound can be prepared in several different ways, all starting from 3,4-diethyl-DELTA2-1,2,4-triazolin-5-one (I): 1) The condensation of (I) with N-(3-bromopropyl)-N'-(m-chlorophenyl)piperazine (B) by means of NaNH2, NaH or sodium alcoholate in an organic solvent (DMSO, DMF, dioxane, benzene, alcohol, tetralin, etc.). 2) The condensation of (I) with 1-chloro-3-bromopropane (A) by means of sodium alcoholate in alcohol gives 1-(3-chloropropyl)-3,4-diethyl-DELTA2-1,2,4-triazolin-5-one (II), which is then condensed with an inert solvent by means of HCl acceptor. 3) The condensation of (II) with diethanolamine (C) affords 1-(3-bishydroxyethylaminopropyl)-3,4-diethyl-DELTA2-1,2,4-triazolin-5-one (III), which is then converted into the corresponding dichlorocompound (IV) by means of SOCl2. Finally, (IV) is cyclized with m-chloroaniline (E).