[(1S,5R)-8-methyl-8-azabicyclo[3.2.1]octan-3-yl] (2R)-3-hydroxy-2-phenylpropanoate;sulfuric acid;hydrate
An alkaloid, originally from Atropa belladonna, but found in other plants, mainly SOLANACEAE. Hyoscyamine is the 3(S)-endo isomer of atropine.