Ureade or Ureide: How To spell?

The word Ureade is misspelled against Ureide, a noun meaning "Any one of the many complex derivatives of urea; thus, hydantoin, and, in an extended dense, guanidine, caffeine, et., are ureides."

Word contains consecutive vowels 'EI' in between alphabets ur & de is misspelled as 'EA'
Wrong Spelling:  ur-ea-de 
Correct Spelling:  ur-ei-de 
Explore spell check of Ureide to spell without errors.