We don't have synonyms for cerealin yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cereal, certain and creatin.
(n) :
(organic chemistry) A nitrogenous substance closely resembling diastase, obtained from bran, and possessing the power of converting starch into dextrin, sugar, and lactic acid.
(n) :
(organic chemistry) A nitrogenous substance closely resembling diastase, obtained from bran, and possessing the power of converting starch into dextrin, sugar, and lactic acid.