Althene or Altheine: How To spell?

The word Althene is misspelled against Altheine, a noun meaning "Asparagine."

Word contains consecutive vowels 'EI' in between alphabets alth & ne is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  alth-e-ne 
Correct Spelling:  alth-ei-ne 
Explore spell check of Altheine to spell without errors.