(1α,2β,4β,5α,7β)-7-[(Hy-droxydi-2-thienylacetyl)axy]-9,9-dimethyl-3-oxa-9-azoniatri-cyclo[3.3.1.02.4]nonane (1a,2b,4b,5a,7b)-7-[(Hydroxydi-2-thienylacetyl)oxy]-9,9-dimethyl-3-oxa-9-azoniatricyclo[3.3.1.02,4]nonane bromide Anhydrous Tiotropium Bromide 3-Oxa-9-azoniatricyclo[3.3.1.02,4]nonane, 7-[(2-hydroxy-2,2-di-2-thienylacetyl)oxy]-9,9-dimethyl-, bromide (1:1), (1α,2β,4β,5α,7β)- (1R,2R,4S,5S,7s)-7-[(2-Hydroxy-2,2-dithiophen-2-ylacetyl)oxy]-9,9-dimethyl-3-oxa-9-azoniatricyclo[3.3.1.02,4]nonane bromide monohydrate (1a,2,4,5a,7)-7-[(2-Hydroxy-2,2-di-2-thienylacetyl)oxy]-9,9-dimethyl-3-oxa-9-azoniatricyclo[3.3.1.02,4]nonane Bromide (1α，2β，4β，5α，7β-7-[(Hydroxydi-2-thienylacetyl)oxy]-9，9-dimethyl-3-oxa-9-azoniatricyclo[3．3．1．0^<2,4>^]nonane bromide Ba-679