5.3.99.11 2,4,6/3,5-pentahydroxycyclohexanone 2,4,6/3,5-pentahydroxycyclohexanone i.e. (2R,3S,4s,5R,6S)-2,3,4,5,6-pentahydroxycyclohexanone i.e. scyllo-inosose. The enzyme is part of the myo-inositol/D-chiro-inositol degradation pathway leading to acetyl-CoA