| abstract |
The present invention relates to R-6-hydroxy-8- {1-hydroxy-2- [2- (4-methoxy-phenyl) -1,1-dimethyl-ethylamino] -ethyl} -4H-- of formula (1) Benzo [1,4] oxazin-3-one-hydrochloride crystalline, enantiomerically pure hydrate, and with one or more other active substances for the treatment of respiratory diseases Combined, relates to its action as a sustained release beta mimetic. (1) |