Tropaune or Tropeine: How To spell?

The word Tropaune is misspelled against Tropeine, a noun meaning "Any one of a series of artificial ethereal salts derived from the alkaloidal base tropine."

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