Abstract: Use of compounds of formula (I): wherein X is S, O, S?O, SO2, NRa, or CRbRc; R1, R2 are halogen, OH, SH, NH2, CN, NO2, alkyl, alkoxy, alkylamino, dialkylamino, alkylthio, alkenyl, alkenyloxy, alkenylamino, alkenylthio, alkynyl, alkynyloxy, alkynylamino, alkynylthio, alkylsulfonyl, alkylsulfoxyl, alkenylsulfonyl, alkynylsulfoxyl, formyl, alkylcarbonyl, hydroxycarbonyl, alkoxycarbonyl, carbonyloxy, alkylcarbonyloxy, phenyloxy, alkylcarbonylamino, C(O)NRdRe, or (SO2)NRdRe, or C(?NORf)-Gp-Rf?, or a mono- or bicyclic 5- to 10-membered aromatic or heteroaromatic ringsystem, optionally substituted, which is unfused or fused to the aromatic group to which it is bonded and which, when unfused, is bonded directly or through an O, S, alkyl, or alkoxy linkage, or cycloalkyl, wherein the carbon atoms in these groups may be substituted.