Orcaun or Orcein: How To spell?

The word Orcaun is misspelled against Orcein, a noun meaning "A reddish brown amorphous dyestuff, /, obtained from orcin, and forming the essential coloring matter of cudbear and archil. It is closely related to litmus."

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