| abstract |
The invention provides compounds of the general formula (I) and the salts thereof, preferably the pharmaceutically acceptable salts thereof; in which R1 is straight-chain C1-8-alkanoyloxy, straight-chain C1-8-alkoxy, straight-chain C1-8-alkoxy-straight-chain-C1-8-alkoxy, straight-chain C1-8-alkoxycarbonylamino, straight-chain C0-8-alkylcarbonylamino, optionally N-mono- or N,N-di-C1-8-alkylated amino or hydroxy or straight-chain omega-hydroxy-C1-8-alkyl. |