The enzyme participates in the biosynthesis of several deoxysugars, including ¦Â-L-4-epi-vancosamine, ¦Á-L-megosamine,?L- and?D-olivose,?D-oliose,?D-mycarose, forosamine and ¦Â-L-digitoxose.?In vitro?the intermediate can undergo a spontaneous decomposition to maltol [2,3].