We don't have synonyms for hyoscyamines yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are hyoscyamine.
(n) :
(biochemistry, pharmacology) A poisonous alkaloid present in henbane that is the stereoisomer of atropine, with similar properties to hyoscine, and used medicinally to treat abdominal pain and similar conditions.
(n) :
(biochemistry, pharmacology) A poisonous alkaloid present in henbane that is the stereoisomer of atropine, with similar properties to hyoscine, and used medicinally to treat abdominal pain and similar conditions.