We don't have synonyms for flavine yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are flavin, flavone and flavins.
(n) :
Alternative spelling of flavin. [(biochemistry) Any of a class of tricyclic heterocyclic compounds derived from riboflavin; found especially as the adenine dinucleotide (FAD)]
(n) :
Alternative spelling of flavin. [(biochemistry) Any of a class of tricyclic heterocyclic compounds derived from riboflavin; found especially as the adenine dinucleotide (FAD)]