The invention relates to compounds of the general formula (I) and salts and physiologicallyfunctional derivatives thereof, wherein Y is -NRR, -NRC=ONRR-NRC=SNRR, -NRC=NRNR,heterocycle, - C=ONRR, heterocycle, or aryl； n is O to8； m is 0, or 1 ； r is 0 to 3； t is O to 3； X is O or N； Z is CH, C=O, C=S or a singlebond； Z is CO-R, CS-R, (CH)-Ror the side-chain of a naturally occuring amino acid； , Z is CO-R, CS-R or (CH)-R or the side-chainof a naturally occuring amino acid； Z is CO-R, CS-Ror (CH)-R or the side-chain of a naturallyoccuring amino acid； Zis H, alkyl, alkoxy, or cycloalkyl； R,R, R, and R are independently from each otherH, OH, SH, NH, CN, NO, alkyl, cycloalkyl, heterocycloalkyl,haloalkyl, alkylthio, haloalkyloxy, hydroxyalkyl, hydroxyalkylarnino,alkylamino, alkylaryl, alkylsulfinyl, alkylsulfonyl, alkylthioalkyl, alkylsulfinylalkyl,alkylsulfonylalkyl, alkoxyalkyl, alkoxy, aryloxy, heteroaryl, aryl, or halogen.
