This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is D-apiitol:NAD+ 1-oxidoreductase. Other names in common use include D-apiose reductase, and D-apiitol reductase.
References
Hanna R, Picken M, Mendicino J (1973). "Purification of a specific D-apiitol dehydrogenase from a Micrococcus isolated from the surface of germinating parsley seeds". Biochim. Biophys. Acta. 315: 259–271. doi:10.1016/0005-2744(73)90255-6.