The invention relates to chemical compound of the general structure [A-R3—X—R4] where A=[R1-R2] or [R1] R1=aryl, heteroaryl R2=alkyl, aryl, heteroaryl, carbonyl, thiocarbonyl, alkyl ester, alkyl thioester R3=O, S, NH X=closo- or nido-boron cluster R4= where Z=OH, SH, NH2 where R5 is selected from H, alkyl, aryl, heteroaryl, alkyl ether, alkyl thioether, alkylamine and R6 is selected from alkyl, aryl, heteroaryl, alkyl ether, alkyl thioether, alkylamine and where R3 and R4 are in meta or para positions to one another, to a process for preparation thereof and to the use thereof, especially in medicine, for example in the inhibition of lipoxygenase.