abstract |
The present invention provides crystalline S-(-)-9-fluoro-6,7-dihydro-8- (4-hydroxypiperidin-1-yl) -5-methyl-1-oxo-1H, 5H -Benzo [i, j] quinolizine-2-carboxylic acid L-arginine salt tetrahydrate, a process for its preparation and a pharmaceutical formulation comprising it as an active ingredient for use in the treatment of microbial infections. |