Patent ID: 8003640

Claim:
A compound of the formula or its pharmaceutically acceptable salt, in which R 1 is C 1-8 -alkanoyloxy, C 1-8 -alkanoyloxy-C 1-8 -alkyl, C 1-8 -alkoxy, C 1-8 -alkoxy-C 1-8 -alkoxy, C 1-8 -alkoxy-C 1-8 -alkoxy-C 1-8 -alkyl, C 1-8 -alkoxy-C 1-8 -alkyl, C 1-8 -alkoxycarbonylamino, C 1-8 -alkoxycarbonylamino-C 1-8 -alkyl, C 0-8 -alkylcarbonylamino, C 0-8 -alkylcarbonylamino-C 1-8 -alkyl, O—C 1-8 -alkylated carboxyl, O—C 1-8 -alkylated carboxyl-C 1-8 -alkyl, optionally N-mono- or N,N-di-C 1-8 -alkylated amino, optionally N-mono- or N,N-di-C 1-8 -alkylated amino-C 1-8 -alkyl, optionally N-mono- or N,N-di-C 1-8 -alkylated amino-carbonylamino, optionally N-mono- or N,N-di-C 1-8 -alkylated amino-carbonylamino-C 1-8 -alkyl, heterocyclyl, heterocyclyl-C 1-8 -alkyl, heterocyclyl-C 0-8 -alkyl-carbonyl-C 0-8 -alkylamino, heterocyclyl-C 0-8 -alkyl-carbonyl-C 0-8 -alkylamino-C 1-8 -alkyl, heterocyclyl-C 0-8 -alkyl-carbonyl-C 1-8 -alkyl, cycloalkyl-C 0-8 -alkyl-carbonyl-C 0-8 -alkylamino, cycloalkyl-C 0-8 -alkyl-carbonyl-C 0-8 -alkylamino-C 1-8 -alkyl, hydroxyl, hydroxy substituted C 1-8 -alkyl, optionally N-mono-, -di- or -tri-C 1-8 -alkylated or heterocyclyl-substituted ureido, or optionally N-mono-, -di- or -tri-C 1-8 -alkylated or heterocyclyl-substituted ureido-C 1-8 -alkyl and whereby the heterocyclyl and cycloalkyl radicals mentioned hereinbefore are unsubstituted or substituted.