| 摘要 |
The present invention concerns compounds of the following formula (I) or a pharmaceutically acceptable salt thereof, a stereoisomer or a mixture of stereoisomers in any proportion, in particular a mixture of enantiomers, and particularly a racemate mixture, in which R represents H, OH or OR19, as well as processes for preparing these compounds and their use as inducer for the transcription of genes under control of the lac promoter.; |
