This enzyme belongs to the family of hydrolases, specifically those glycosidases that hydrolyse O- and S-glycosyl compounds. The systematic name of this enzyme class is bis-D-fructose 2',1:2,1'-dianhydride fructohydrolase. This enzyme is also called inulobiose hydrolase.
Matsuyama T; Tanaka K (1989). "On the enzyme of Aspergillus fumigatus producing difructose anhydride I from inulobiose". Agric. Biol. Chem. 53: 831–832. doi:10.1271/bbb1961.53.831.
Matsuyama T, Tanaka K, Mashiko M, Kanamoto M (October 1982). "Enzymic formation of di-D-fructose 1,2'; 2,1' dianhydride from inulobiose by Aspergillus fumigatus". J. Biochem. Tokyo. 92 (4): 1325–8. PMID6757245.