Synonyms: Hyoscyamine Sulphate Imp. D (EP) as Hydrobromide Trihydrate, Hyoscine Butylbromide Imp. A (EP) as Hydrobromide Trihydrate, Atropine Imp. F (EP) as Hydrobromide Trihydrate, (-)-Scopolamine hydrobromide trihydrate, Hyoscine hydrobromide trihydrate, Scopolamine hydrobromide trihydrate,Hyoscine Hydrobromide Trihydrate, (αS)-α-(Hydroxymethyl)benzeneacetic acid (1α,2β,4β,5α,7β)-9-methyl-3-oxa-9-azatricyclo[3.3.1.0²,⁴]non-7-yl ester hydrobromide hydrate (1:1:3), (αS)-α-(Hydroxymethyl)benzeneacetic acid (1α,2β,4β,5α,7β)-9-methyl-3-oxa-9-azatricyclo[3.3.1.0²,⁴]non-7-yl ester hydrobromide trihydrate, α-(Hydroxymethyl)benzeneacetic acid [7(S)-(1α,2β,4β,5α,7β)]-9-methyl-3-oxa-9-azatricyclo[3.3.1.0²,⁴]non-7-yl ester hydrobromide trihydrate, 3-Oxa-9-azatricyclo[3.3.1.0²,⁴]nonane benzeneacetic acid