Hemateen or Hematein: How To spell?

The word Hemateen is misspelled against Hematein, a noun meaning "A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins."

Word contains consecutive vowels 'EI' in between alphabets hemat & n is misspelled as 'EE'
Wrong Spelling:  hemat-ee-n 
Correct Spelling:  hemat-ei-n 
Explore spell check of Hematein to spell without errors.