In enzymology, an inositol 2-dehydrogenase is an enzyme that catalyzes the chemical reaction myo-inositol + NAD+ ⇌ {\displaystyle \rightleftharpoons } 2,4,6/3,5-pentahydroxycyclohexanone + NADH + H+Thus, the two substrates of this enzyme are myo-inositol and NAD+, whereas its 3 products are 2,4,6/3,5-pentahydroxycyclohexanone, NADH, and H+. Wikipedia