Patent ID: 7312200

Claim:
A compound according to formula (I) and salts thereof, in which X represents O, NH, or NMe, R 1 represents hydrogen or an amino sugar according to one of the formulas 1a to 1g R 2 represents optionally substituted aryl-C 1 -C 3 -alkyl or hetaryl-C 1 -C 3 -alkyl, wherein the substituents are selected from the group consisting of hydrogen, straight-chained or branched alkyl with up to 4 carbon atoms, halogenalkyl with up to 2 carbon atoms, alkenyl with up to 3 carbon atoms, cyclic alkyl with up to 6 carbon atoms, hydroxy, halogen, alkoxy, cycloalkoxy, alkenyloxy, dioxoalkylene, halogenalkoxy, alkylthio, halogenalkylthio, alkylsulphonyl, halogenalkylsulphonyl, hetarylsulphonyl, nitro, amino, a cyclic amino group, alkylamino, alkyleneamino, dialkylamino, carboxyl, carbamoyl, cyano, alkoxycarbonyl, alkyleneoxycarbonyl, N-alkoxycarbonyl-amino, cyanoalkylenecarbonylamino, N-alkyleneoxycarbonylamino, N-alkylsulphonylamino, N-alkylenesulphonylamino, optionally substituted arylsulphonylamino, N-alkoxycarbonyl-N-alkyl-amino, N-alkyleneoxycarbonyl-N-alkylamino, N-alkylcarbonyl-N-alkylamino, N-cycloalkylcarbonylamino, N-cyclobutylamino, N-alkoxycarbonyl-N-alkylsulphonylamino, N-alkyleneoxycarbonyl-N-alkylsulphonylamino, N-alkylcarbonyl-N-alkylsulphonylamino, N-cycloalkylcarbonyl-N-alkylsulphonylamino, alkylamino-carbonylamino, N,N-dialkylaminocarbonylamino, N-alkylaminosulphonylamino, and N,N-dialkylaminosulphonylamino, or if X represents NH or NMe, represents CO—R′ or CS—R′, where R′ represents amino or optionally substituted C 1 -C 4 -alkyl, C 1 -C 4 -alkylamino, di-C 1 -C 4 -alkylamino, aryl, arylamino, hetarylamino, aryl-C 1 -C 3 -alkyl, hetaryl, or hetaryl-C 1 -C 3 -alkyl, R 3 represents hydrogen or hydroxy, and A-B represents —HC═CH—, —HC═C(CH 3 )—, —H 2 C—CH 2 —, or —H 2 C—CH(CH 3 )—.