Crocen or Crocein: How To spell?

The word Crocen is misspelled against Crocein, a noun meaning "A name given to any one of several yellow or scarlet dyestuffs of artificial production and complex structure. In general they are diazo and sulphonic acid derivatives of benzene and naphthol."

Word contains consecutive vowels 'EI' in between alphabets croc & n is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  croc-e-n 
Correct Spelling:  croc-ei-n 
Find more incorrect spellings of Crocein to spell right way.