We don't have synonyms for tropeolins yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are tropeolin, tropaeolin and troponins.
(n) :
Alternative form of tropaeolin. [Any of several orange dyes of very complex composition: tropaeolin O (acid orange 6, chrysoine resorcinol), tropaeolin OO (acid orange 5), or tropaeolin OOO (acid orange 7).]
(n) :
Alternative form of tropaeolin. [Any of several orange dyes of very complex composition: tropaeolin O (acid orange 6, chrysoine resorcinol), tropaeolin OO (acid orange 5), or tropaeolin OOO (acid orange 7).]