| 摘要 |
<p>Compounds of the general formula
and the salts thereof, preferably the pharmaceutically acceptable salts thereof;
in which
R 1 is straight-chain C 1-8 -alkanoyloxy, straight-chain C 1-8 -alkoxy, straight-chain C 1-8 -alkoxy-C 1-8 -alkoxy, straight-chain C 1-8 -alkoxycarbonylamino, straight-chain C 0-8 -alkylcarbonylamino or hydroxy or straight-chain É-hydroxy-C 1-8 -alkyl.</p> |
