Helleboraun or Helleborein: How To spell?

The word Helleboraun is misspelled against Helleborein, a noun meaning "A poisonous glucoside accompanying helleborin in several species of hellebore, and extracted as a white crystalline substance with a bittersweet taste. It has a strong action on the heart, resembling digitalin."

Word contains consecutive vowels 'EI' in between alphabets hellebor & n is misspelled as 'AU'
Wrong Spelling:  hellebor-au-n 
Correct Spelling:  hellebor-ei-n 
Check more misspelled words of Helleborein to spell it correct.